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Backyard Worlds Volunteers Complete Ten Million Classifications in an Epic Search for New Objects Among the Nearest StarsBy NASA
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Backyard Worlds Volunteers Complete Ten Million Classifications in an Epic Search for New Objects Among the Nearest Stars
A few Backyard Worlds volunteers. Credit: Backyard Worlds
Top (l-r): Arttu Sainio, Frank Kiwy, Jean Marc Gantier, Marianne Michaels, Les Hamlet, Melina Thévenot,
2nd row (l-r): Kevin Apps, Nikolaj Stevnbak Andersen, Rebekah Russwurm, Jörg Schümann, Guoyou Sun, Tom Bickle
3rd row (l-r): Michiharu Hyogo, Katharina Doll, Hugo Durantini-Luca, Yadukrishna Raghu, Hiro Higashimura,
4th row (l-r): Ben Pumphrey, Zbigniew Wedracki, Guillaume Colin, Anya Frazer, Dan Caselden
4th row (l-r): Kristin Grant, Maurizio Ventura, Harshdeep Singh, Celso Pessanha Machado, Austin Rothermich
6th row (l-r): Edoardo Antonini, Peter Jalowiczor, Leopold Gramaize, Hunter Brooks, William Pendrill The Backyard Worlds: Planet 9 and Backyard Worlds: Cool Neighbors projects invite members of the public to search images from NASA’s Wide-Field Infrared Survey Explorer (WISE) mission to find new objects among the nearest stars. These projects share a science team and many volunteers–a total of more than 175,000 participants from more than 167 countries. Last week, the combined efforts of this giant Backyard Worlds team reached an incredible milestone: a total of 10,000,000 classifications of WISE mission image sets.
Since 2017, when the first Backyard Worlds project (Planet 9) launched, these projects have discovered more than 3800 nearby objects, including 12% of all the known stellar and substellar objects out to a distance of 60 light years. Those objects include many rare brown dwarfs, balls of gas that are not massive enough to become stars. Among them are roughly 15 Y dwarfs–the rarest kind of brown dwarf (only about 50 are known). The discoveries also include an entirely new kind of object, the “extreme T subdwarfs,” relics from our Galaxy’s earliest days.
This work has resulted in 20 refereed publications, with more than 40 volunteers named as co-authors on those refereed publications. It has also led to 11 research notes and 25 presentations at meetings of the American Astronomical Society. Several project volunteers have participated in observing runs at NASA’s Infrared Telescope Facility and even won time on NASA’s James Webb Space Telescope.
Best of all, there’s much more data to explore, and the WISE mission continues to scan the skies! So come join the fun and make your own discoveries at backyardworlds.org and coolneighbors.org!
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Last Updated Nov 16, 2023 Related Terms
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9 Min Read Temperatures Across Our Solar System
An illustration of our solar system. Planets and other objects are not to scale. Credits:
NASA What’s the weather like out there? We mean waaaay out there in our solar system – where the forecast might not be quite what you think.
Let’s look at the mean temperature of the Sun, and the planets in our solar system. The mean temperature is the average temperature over the surface of the rocky planets: Mercury, Venus, Earth, and Mars. Dwarf planet Pluto also has a solid surface. But since the gas giants don’t have a surface, the mean is the average temperature at what would be equivalent at sea level on Earth.
An illustration of planets in our solar system showing their mean temperatures. Planets and dwarf planet Pluto are not to scale. NASA Let’s start with our Sun. You already know the Sun is hot. OK, it’s extremely hot! But temperatures on the Sun also are a bit puzzling.
An image of the Sun taken Oct. 30, 2023, by NASA’s Solar Dynamics Observatory. NASA/SDO The hottest part of the Sun is its core, where temperatures top 27 million°F (15 million°C). The part of the Sun we call its surface – the photosphere – is a relatively cool 10,000° F (5,500°C). In one of the Sun’s biggest mysteries, the Sun’s outer atmosphere, the corona, gets hotter the farther it stretches from the surface. The corona reaches up to 3.5 million°F (2 million°C) – much, much hotter than the photosphere.
So some temperatures on the Sun are a bit upside down. How about the planets? Surely things are cooler on the planets that are farther from the Sun.
Well, mostly. But then there’s Venus.
As it sped away from Venus, NASA’s Mariner 10 spacecraft captured this seemingly peaceful view of a planet the size of Earth, wrapped in a dense, global cloud layer. But, contrary to its serene appearance, the clouded globe of Venus is a world of intense heat, crushing atmospheric pressure and clouds of corrosive acid. NASA/JPL-Caltech Venus is the second closest planet to the Sun after Mercury, with an average distance from the Sun of about 67 million miles (108 million kilometers). It takes sunlight about six minutes to travel to Venus.
Venus also is Earth’s closest neighbor and is similar in size. It has even been called Earth’s twin. But Venus is shrouded in clouds and has a dense atmosphere that acts as a greenhouse and heats the surface to above the melting point of lead. It has a mean surface temperature of 867°F (464°C).
So Venus – not Mercury – is the hottest planet in our solar system. Save that bit of info for any future trivia contests.
Maybe Venus is hotter, but Mercury is the closest planet to the Sun. Surely it gets hot, too?
Mercury as seen from NASA’s MESSENGER, the first spacecraft to orbit Mercury. NASA/Johns Hopkins University Applied Physics Laboratory/Carnegie Institution of Washington Mercury is about 36 million miles (57 million kilometers) from the Sun. From this distance, it takes sunlight about three minutes to travel to Mercury. Even though it’s sitting right next to the Sun – relatively speaking – Mercury gets extremely cold at night. It has a mean surface temperature of 333°F (167°C). Daytime temperatures get much hotter than the mean, and can reach highs of 800°F (430°C). But without an atmosphere thick enough to hold in the heat at night, temperatures can dip as low as -290°F (-180°C).
Ahhh, Earth. We know about the weather here, right? Even Earth has some temperatures you may not have heard about.
An image of Earth from the Deep Space Climate Observatory, or DSCOVR. NASA Earth is an average of 93 million miles (150 million kilometers) from the Sun. It takes about eight minutes for light from the Sun to reach our planet.
Our homeworld is a dynamic and stormy planet with everything from clear, sunny days, to brief rain showers, to tornados, to raging hurricanes, to blizzards, and dust storms. But in spite of its wide variety of storms – Earth generally has very hospitable temperatures compared to the other planets. The mean surface temperature on Earth is 59°F (15°C). But Earth days have some extreme temperatures. According to NOAA, Death Valley holds the record for the world’s highest surface air temperature ever recorded on Earth: 134°F (56.7°C) observed at Furnace Creek (Greenland Ranch), California, on July 10, 1913. Earth’s lowest recorded temperature was -128.6°F (89.2°C) at Vostok Station, Antarctica, on July 21, 1983, according to the World Meteorological Organization.
NASA missions have found lots of evidence that Mars was much wetter and warmer, with a thicker atmosphere, billions of years ago. How about now?
Side-by-side animated images show how a 2018 global dust storm enveloped the Red Planet. The images were taken by NASA’s Mars Reconnaissance Orbiter (MRO). NASA/JPL-Caltech/MSSS Mars is an average distance of 142 million miles (228 million kilometers) from the Sun. From this distance, it takes about 13 minutes for light to travel from the Sun to Mars.
The median surface temperature on Mars is -85°F (-65°C). Because the atmosphere is so thin, heat from the Sun easily escapes Mars. Temperatures on the Red Planet range from the 70s°F (20s°C) to -225°F (-153°C). Occasionally, winds on Mars are strong enough to create dust storms that cover much of the planet. After such storms, it can be months before all of the dust settles.
Two NASA rovers on Mars have weather stations. You can check the daily temps at their locations:
Mars Weather Report From Perseverance Curiosity Daily Weather Report The ground temperature around the Perseverance rover ranges from about -136°F to 62°F (-93°C to 17°C). The air temperature near the surface ranges from about -118°F to 8°F (-83°C to -13°C).
As planets move farther away from the Sun, it really cools down fast! Since gas giants Jupiter and Saturn don’t have a solid surface, temperatures are taken from a level in the atmosphere equal in pressure to sea level on Earth. The same goes for the ice giants Uranus and Neptune.
NASA’s Juno spacecraft took this image during a flyby of Jupiter. This view highlights Jupiter’s most famous weather phenomenon, the persistent storm known as the Great Red Spot. Citizen scientist Kevin M. Gill created this image using data from the spacecraft’s JunoCam imager. Enhanced image by Kevin M. Gill (CC-BY) based on images provided courtesy of NASA/JPL-Caltech/SwRI/MSSS Jupiter’s stripes and swirls are beautiful, but they are actually cold, windy clouds of ammonia and water, floating in an atmosphere of hydrogen and helium. The planet’s iconic Great Red Spot is a giant storm bigger than Earth that has raged for hundreds of years. The mean temperature on Jupiter is -166°F (-110°C).
Jupiter is an average distance of 484 million miles (778 million kilometers) from the Sun. From this distance, it takes sunlight 43 minutes to travel from the Sun to Jupiter. Jupiter has the shortest day in the solar system. One day on Jupiter takes only about 10 hours (the time it takes for Jupiter to rotate or spin around once), and Jupiter makes a complete orbit around the Sun (a year in Jovian time) in about 12 Earth years (4,333 Earth days).
Jupiter’s equator is tilted with respect to its orbital path around the Sun by just 3 degrees. This means the giant planet spins nearly upright and does not have seasons as extreme as other planets do.
As we keep moving out into the solar system, we come to Saturn – the sixth planet from the Sun and the second largest planet in our solar system. Saturn orbits the Sun from an average distance of 886 million miles (1.4 billion kilometers). It takes sunlight 80 minutes to travel from the Sun to Saturn.
This series of images from NASA’s Cassini spacecraft shows the development of the largest storm seen on Saturn since 1990. These true-color and composite near-true-color views chronicle the storm from its start in late 2010 through mid-2011, showing how the distinct head of the storm quickly grew large but eventually became engulfed by the storm’s tail. NASA/JPL-Caltech/Space Science Institute Like fellow gas giant Jupiter, Saturn is a massive ball made mostly of hydrogen and helium and it doesn’t have a true surface. The mean temperature is -220°F (-140°C).
In addition to the bone-chilling cold, the winds in the upper atmosphere of Saturn reach 1,600 feet per second (500 meters per second) in the equatorial region. In contrast, the strongest hurricane-force winds on Earth top out at about 360 feet per second (110 meters per second). And the pressure – the same kind you feel when you dive deep underwater – is so powerful it squeezes gas into a liquid.
This colorful movie made with images from NASA’s Cassini spacecraft is the highest-resolution view of the unique six-sided jet stream at Saturn’s north pole known as “the hexagon.” NASA/JPL-Caltech/SSI/Hampton University Saturn’s north pole has an interesting atmospheric feature – a six-sided jet stream. This hexagon-shaped pattern was first noticed in images from the Voyager I spacecraft and was more closely observed by the Cassini spacecraft. Spanning about 20,000 miles (30,000 kilometers) across, the hexagon is a wavy jet stream of 200-mile-per-hour winds (about 322 kilometers per hour) with a massive, rotating storm at the center. There is no weather feature like it anywhere else in the solar system.
Crane your neck to the side while we go check out the weather on Uranus, the sideways planet.
This is an image of the planet Uranus taken by the spacecraft Voyager 2 in 1986. NASA/JPL-Caltech The seventh planet from the Sun with the third largest diameter in our solar system, Uranus is very cold and windy. It has a mean temperature of -320°F (-195°C). Uranus rotates at a nearly 90-degree angle from the plane of its orbit. This unique tilt makes Uranus appear to spin sideways, orbiting the Sun like a rolling ball. And like Saturn, Uranus has rings. The ice giant is surrounded by 13 faint rings and 27 small moons.
Now we move on to the last major planet in our solar system – Neptune. What’s the weather like there? Well you would definitely need a windbreaker if you went for a visit. Dark, cold, and whipped by supersonic winds, giant Neptune is the eighth and most distant major planet orbiting our Sun. The mean temperature on Neptune is -330°F (-200°C).
And not to be outdone by Jupiter and its Great Red Spot, Neptune has the Great Dark Spot – and Scooter. Yep, Scooter.
Voyager 2 photographed these features on Neptune in 1989. NASA/JPL-Caltech This photograph of Neptune was created from two images taken by NASA’s Voyager 2 spacecraft in August 1989. It was the first and last time a spacecraft came close to Neptune. The image shows three of the features that Voyager 2 monitored. At the north (top) is the Great Dark Spot, accompanied by bright, white clouds that undergo rapid changes in appearance. To the south of the Great Dark Spot is the bright feature that Voyager scientists nicknamed “Scooter.” Still farther south is the feature called “Dark Spot 2,” which has a bright core.
More than 30 times as far from the Sun as Earth, Neptune is not visible to the naked eye. In 2011, Neptune completed its first 165-year orbit of the Sun since its discovery.
That wraps up forecasting for the major planets.
But there is one more place we need to check out. Beyond Neptune is a small world, with a big heart – dwarf planet Pluto.
New Horizons scientists use enhanced color images to detect differences in the composition and texture of Pluto’s surface. NASA/JHUAPL/SwRI With a mean surface temperature of -375°F (-225°C), Pluto is considered too cold to sustain life. Pluto’s interior is warmer, however, and some think there may be an ocean deep inside.
From an average distance of 3.7 billion miles (5.9 billion kilometers) away from the Sun, it takes sunlight 5.5 hours to travel to Pluto. If you were to stand on the surface of Pluto at noon, the Sun would be 1/900 the brightness it is here on Earth. There is a moment each day near sunset here on Earth when the light is the same brightness as midday on Pluto.
So the next time you’re complaining about the weather in your spot here on Earth, think about Pluto and all the worlds in between.
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Volunteers Worldwide Successfully Tracked NASA’s Artemis I Mission
NASA’s Space Launch System rocket carrying the Orion spacecraft launches on the Artemis I flight test, Wednesday, Nov. 16, 2022, from Launch Complex 39B at NASA’s Kennedy Space Center in Florida. Photo Credit: NASA/Joel Kowsky In the year since NASA’s historic Artemis I mission successfully launched, the agency has been analyzing data from its approximately 25-day journey around the Moon and back to Earth, including data submitted from volunteers around the world as they tracked the uncrewed Orion spacecraft.
The flight test, which launched on Nov. 16, 2022, atop the agency’s powerful SLS (Space Launch System) rocket, sent the Orion spacecraft nearly 270,000 miles beyond the Moon to test the integrated rocket and spacecraft for the first time before future crewed missions.
NASA’s Space Communications and Navigation (SCaN) program selected 18 participants to attempt to passively track the Orion spacecraft. The effort helped NASA gain a better understanding of external organizations’ tracking capabilities as it seeks to augment the agency’s capabilities for tracking future missions to the Moon, Mars, and beyond.
Ten volunteers successfully tracked the Orion spacecraft during Artemis I’s uncrewed flight test to and from the Moon.
The participants – ranging from international space agencies, academic institutions, commercial companies, nonprofits, and private citizens – attempted to receive Orion’s signal and use their respective ground antennas to passively track and measure changes in the radio waves transmitted by Orion. They took measurements during three phases of the mission: the spacecraft’s journey to the Moon, its orbit around the Moon, and the journey back to Earth.
We have spent the last few months really understanding what the data can mean for future Artemis or lunar tracking efforts.
SCaN Mission Integration and Commitment Manager
“We were happy with the engagement and have spent the last few months really understanding what the data can mean for future Artemis or lunar tracking efforts,” said John Hudiburg, SCaN Mission Integration and Commitment Manager.
Data collected from the participants was provided to Flight Dynamics Facility (FDF) analysts at NASA’s Goddard Space Flight Center in Greenbelt, Maryland, for evaluation.
“The public and industry sector’s response was very exciting,” said Flight Dynamics Facility liaison Juan Crenshaw. “It shows the worldwide interest in supporting the next era of human exploration. The Flight Dynamics Facility analysts found that the data showed promising results, with many of the participants successfully tracking Orion during its journey.”
Sam Schrieber, Director of Goddard’s Flight Dynamics Facility sits on console at NASA’s Goddard Space Flight Center in Greenbelt, Md., for the Artemis I launch on November 16, 2023. NASA To process the data, analysts combined it with operational data from NASA’s Deep Space Network and generated standard datasets that were easier to analyze. Analysts then compared this data against the actual Artemis I tracking data collected by engineers at NASA’s Johnson Space Center in Houston. This comparison allowed analysts to identify any errors or trends in the data.
Some of the data submitted also revealed certain challenges. These challenges included differences in the implementation of Consultative Committee for Space Data Systems (CCSDS) standards, formatting issues with the data, data quality issues. However, these challenges help NASA understand what information should be clarified for future tracking efforts.
“NASA gained an understanding of the broader community’s capabilities, the participating organizations got to show what they can do in terms of tracking, and the Flight Dynamics Facility learned how to analyze unconventional external tracking data,” said Flight Dynamics Facility Deputy Operations Director Jason Laing. “Now, we can take the lessons learned and apply them to potential tracking opportunities for future missions.”
SCaN serves as the program office for all of NASA’s space communications and navigation activities and supports the Artemis missions through both the Near Space Network and Deep Space Network. SCaN is a part of NASA’s Space Operations Mission Directorate at NASA Headquarters in Washington.
With Artemis missions, NASA is collaborating with commercial and international partners to explore the Moon for scientific discovery and technology advancement and establish the first long-term presence on the Moon. The Moon missions will serve as training for how to live and work on another world as NASA prepares for human exploration of Mars.
By Katrina Lee
NASA’s Goddard Space Flight Center, Greenbelt, Md
Last Updated Nov 15, 2023 Editor Katherine S. Schauer Contact Katherine S. Schauerkatherine.firstname.lastname@example.org Location Goddard Space Flight Center Related Terms
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4 Min Read Arkansas City Welcomes NASA to Discuss 2024 Total Solar Eclipse
Adam Kobelski, a solar astrophysicist with Marshall, shares tips to safely view a total solar eclipse. Many U.S. cities, including Russellville, Arkansas, are planning watch parties to view the April 2024 total solar eclipse. Credits: Joshua Mashon The contiguous United States will see only one total solar eclipse between now and the year 2044, and the citizens of Russellville, Arkansas, are ready.
On Monday, April 8, 2024, the Moon will pass between the Sun and Earth, providing a rare opportunity for those in the path of the Moon’s shadow to see a total solar eclipse, including the Sun’s outer atmosphere, or corona. With more than 100,000 tourists expected to visit Russellville for this rare experience, elected officials and industry leaders hosted a team of NASA experts from the Marshall Space Flight Center in Huntsville, Alabama, to discuss educational outreach opportunities.
More than 1,000 people attended a free solar eclipse presentation in Russellville, Arkansas, featuring experts from NASA’s Marshall Space Flight Center in Huntsville, Alabama, Oct. 30. Joshua Mashon “Having NASA involved elevates the importance of this eclipse and amplifies the excitement for our community,” said Russellville Mayor Fred Teague. “We are thankful for the rich discussions and insight provided by NASA, and we look forward to hosting them again during the April eclipse.”
Due to the length of the eclipse totality in Russellville, NASA is planning to host part of the agency’s live television broadcast from the city, as well as conduct several scientific presentations and public outreach events for visitors. Additional factors for selecting Russellville included access to a large university, and proximity to Little Rock – the state’s capital – to engage media outlets and key stakeholders representing industry and academia.
The day-long Oct. 30 visit helped NASA learn how the city is preparing for the massive influx of tourists and news media personnel. Christie Graham, director of Russellville Tourism, explained the city’s commitment to the eclipse and how their planning processes started more than a year in advance.
“Months ago, we created our solar eclipse outreach committee, consisting of key stakeholders and thought leaders from across the city,” Graham said. “We’ve developed advanced communication and emergency management plans which will maximize our city’s resources and ensure everyone has a safe and memorable viewing experience.”
Following the NASA public presentation about the April 2024 total solar eclipse, Kobelski chats with guests interested in learning more about NASA and heliophysics. NASA/Christopher Blair This visit also provided NASA an opportunity to share important heliophysics messaging with the public, including the next generation of scientists, engineers, and explorers. To learn how best to interact with local students, NASA team members met with the Russellville School District Superintendent Ginni McDonald and Arkansas Tech University President Russell Jones.
“Leveraging the eclipse to provide quality learning opportunities will be a valuable and unforgettable experience for all,” said McDonald. “Our staff enjoyed discussing best strategies and look forward to sharing NASA educational content with our students.”
The team also discussed internship opportunities available for students to work at NASA centers across the nation, as well as how to get involved in NASA’s Artemis student challenges, sophisticated engineering design challenges available for middle school, high school, college and university students.
“Our university serves nearly 10,000 students, many pursuing a variety of STEM (science, technology, engineering, and math) degrees, including mechanical and electrical engineering, biological and computer sciences, nursing, and more,” Jones said.
It is important our students learn of the many unique opportunities available with NASA and how they can get involved.”
Arkansas Tech University President
“It is important our students learn of the many unique opportunities available with NASA and how they can get involved.”
The agency’s visit concluded with a free public presentation at the Center for Performing Arts, where more than 1,000 attendees gained insight on the upcoming eclipse from Dr. Adam Kobelski, a solar astrophysicist at Marshall. Following the presentation, all NASA team members participated in a question-and-answer session with audience members of all ages.
Overall, the visit proved valuable for everyone with NASA team members remarking how enthusiastic and prepared both Russellville and the university are to support the eclipse event.
Adam Kobelski, a solar astrophysicist with Marshall, shares tips to safely view a total solar eclipse. Many U.S. cities, including Russellville, Arkansas, are planning watch parties to view the April 2024 total solar eclipse. “It was a refreshing reminder of the public’s excitement for the science we conduct at NASA,” said Kobelski. “This experience established my overall confidence in their readiness to successfully host a quality viewing experience for everyone.”
The April eclipse is part of the Heliophysics Big Year, a global celebration of solar science and the Sun’s influence on Earth and the entire solar system. Everyone is encouraged to participate in solar science events such as watching solar eclipses, experiencing an aurora, participating in citizen science projects, and other fun Sun-related activities.
Cities across the nation are planning eclipse watch parties and other celebrations to commemorate the event. Weather permitting, the April 2024 total eclipse will be visible across 13 states, from Texas to New York.
Learn More About the 2024 Eclipse Christopher Blair
Marshall Space Flight Center, Huntsville, Ala
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Calling all Eclipse Enthusiasts: Become a NASA Partner Eclipse Ambassador!
By Vivian White, Astronomical Society of the Pacific
Eclipse Ambassadors help share information with their communities about how to safely observe the Sun, such as using handheld solar viewers. Los Angeles Astronomical Society/Iraneide De Oliveira Are you an astronomy enthusiast or undergraduate student with a passion for sharing space science? We are excited to share with you a wonderful opportunity to become an official NASA Partner Eclipse Ambassador and help your community experience the awe and wonder of science.
In this exciting NASA partnership funded through NASA’s Science Activation program, undergraduate students and experienced eclipse enthusiasts who become Eclipse Ambassadors will pair up to engage and prepare local communities in advance of the April 2024 solar eclipse. All training, partnerships, resources, and connections with local underserved partners will be provided. The program supports community outreach before the upcoming 2024 eclipse in communities off the path of totality. Undergraduates will also receive a stipend and opportunities to further their involvement in NASA programs.
If this interests you, apply today. You can also find Eclipse Ambassadors near you via our Eclipse Ambassadors map. We are still recruiting and partnering hundreds of Eclipse Ambassadors across the U.S. through the end of 2023, but don’t hesitate. Your community needs you!
What you’ll find when you apply:
A supportive network of enthusiasts who regularly share eclipse support A partner in your community (each partnership consists of an undergraduate and an eclipse enthusiast) Materials including solar viewing glasses, activities, handouts, and more Connections to local community centers reaching underserved audiences Regular social hours and presentations from experts in eclipses and communication Opportunities to continue your journey with NASA through collaborations with partners in heliophysics, education, and communication
Learn More and Apply
People use handmade solar viewers to safely observe the Sun at Faulkner County Library in Arkansas. Darcy Howard Share
Last Updated Nov 07, 2023 Related Terms
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