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The Marshall Star for June 18, 2024
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By NASA
Explore This Section Science Uncategorized Helio Highlights: June… Home Framework for Heliophysics Education About Helio Big Idea 1.1 Helio Big Idea 1.2 Helio Big Idea 1.3 Helio Big Idea 2.1 Helio Big Idea 2.2 Helio Big Idea 2.3 Helio Big Idea 3.1 Helio Big Idea 3.2 Helio Big Idea 3.3 Helio Missions Helio Topics Resource Database About NASA HEAT More Highlights Space Math 4 min read
Helio Highlights: June 2025
4 Min Read Helio Highlights: June 2025
An artist’s interpretation of the Parker Solar Probe flying through the corona. Credits:
NASA Two Stars in Solar Science
It takes a lot of work to make space missions happen. Hundreds or even thousands of experts work as a team to put together the spacecraft. Then it has to be tested in conditions similar to space, to be sure that it can survive out there once it is launched. Fixing big issues that pop up after launch is either impossible or very difficult, so it is important that everything works before the mission gets to space.
The Parker Solar Probe and Solar Orbiter missions study the Sun from different points of view. Parker is led by NASA and was built to fly into the upper atmosphere of the Sun, called the corona. Solar Orbiter is led by the European Space Agency (ESA) and has gotten our first peek at the Sun’s poles. Together, they both provide a deeper understanding of the Sun and how it affects the rest of the solar system.
A New Way of Seeing
It takes a lot of teamwork to build and launch any space mission, and Solar Orbiter was no different. It also had to go through a lot of testing in conditions similar to outer space before it made its final journey to the launch site.
The Solar Orbiter mission has taken the highest-ever-resolution images of the Sun and recently sent back the first ever close-up images of the Sun’s poles. It has also studied the solar wind to see what it is made of and helped scientists find out where on the Sun the solar wind comes from. Working hand-in-hand with Parker, it has also shown how the solar wind gets a magnetic “push” that increases its total speed.
An infographic showing the ten scientific instruments carried aboard Solar Orbiter European Space Agency To get all of this done, the spacecraft carries ten different scientific instruments on its voyage around the Sun. These instruments work together to provide a total overview of our star. Six of them are remote-sensing instruments (above in gold), which “see” the Sun and return imagery to Earth. The other four are what’s called in-situ instruments (above in pink), which measure the environment all around the spacecraft. This includes the solar wind, and the electric and magnetic fields embedded within it.
Faster and Closer Than Ever Before
The Parker Solar Probe was named for Dr. Eugene N. Parker, who pioneered our modern understanding of the Sun. In the mid-1950s, Parker developed a theory that predicted the solar wind. The probe named after him is designed to swoop within 4 million miles (6.5 million kilometers) of the Sun’s surface to trace its energy flow, to study the heating of the corona, and to explore what accelerates the solar wind.
To get all this done, the probe has to survive the blazing hot corona. It can get up to about 2 million °F (1.1 million °C)! Parker uses high-tech thermal engineering to protect itself, including an eight-foot diameter heat shield called the Thermal Protection System (TPS). The TPS is made of two panels of carbon composite with a lightweight 4.5-inch-thick carbon foam core. This heat shield sandwich keeps things about 85 °F (29 °C) in its shadow, even though the Sun-facing side reaches about 2,500 °F (1,377 °C)!
In 2018, the Parker Solar Probe became the fastest spacecraft ever built, at about 430,000 miles per hour (700,000 kilometers per hour). It also got seven times closer to the Sun than any other spacecraft, getting within 3.8 million miles (6.2 million kilometers). It made this record-breaking close encounter on Christmas Eve of 2024.
From Yesterday to Tomorrow
The Parker Solar Probe was launched on August 12, 2018, and Solar Orbiter was launched on February 10, 2020. Both of them took off from Cape Canaveral Air Station in Florida. Some pieces of Solar Orbiter were transported in trucks, but the completed spacecraft made the journey from Europe to the U.S. on a gigantic Antonov cargo plane designed especially for transporting spacecraft.
Together, these spacecraft have done a lot to improve our knowledge of the Sun. Both missions are currently in their main operational phase, with projected end-of-mission sometime in 2026, and could continue returning data for a few years to come.
Here are more resources about these missions
Lesson Plans & Educator Guides
NASA Helio Club
Lesson Plan
A collection of six lessons created for a middle-school audience that introduce basic heliophysics concepts.
Interactive Resources
Build A Model Solar
Probe Activity
A hands-on guide showing students how to construct a homemade model of the Parker Solar Probe.
Webinars & Slide Decks
Parker’s Perihelion
The Parker Solar Probe mission is the first spacecraft to “touch” the Sun, and made its closest approach in late 2024.
How will Parker Solar Probe study the Sun?
A slide deck with resources explaining how the Parker Solar Probe can study the Sun and survive.
Exploring the Sun with Solar Orbiter Video
A video conversation about the Solar Orbiter mission with NASA scientist Dr. Teresa Nieves-Chinchilla.
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By European Space Agency
Image: This image tells the story of redemption for one lonely star. The young star MP Mus (PDS 66) was thought to be all alone in the Universe, surrounded by nothing but a featureless band of gas and dust called a protoplanetary disc. In most cases, the material inside a protoplanetary disc condenses to form new planets around the star, leaving large gaps where the gas and dust used to be. These features are seen in almost every disc – but not in MP Mus’s.
When astronomers first observed it with the Atacama Large Millimeter/submillimeter Array (ALMA), they saw a smooth, planet-free disc, shown here in the right image. The team, led by Álvaro Ribas, an astronomer at the University of Cambridge, UK, gave this star another chance and re-observed it with ALMA at longer wavelengths that peer even deeper into the protoplanetary disc than before. These new observations, shown in the left image, revealed a gap and a ring that had been obscured in previous observations, suggesting that MP Mus might have company after all.
Meanwhile, another piece of the puzzle was being revealed in Germany as Miguel Vioque, an astronomer at the European Southern Observatory, studied this same star with the European Space Agency’s (ESA’s) Gaia mission. Vioque noticed something suspicious – the star was wobbling. A bit of gravitational detective work, together with insights from the new disc structures revealed by ALMA, showed that this motion could be explained by the presence of a gas giant exoplanet.
Both teams presented their joint results in a new paper published in Nature Astronomy. In what they describe as “a beautiful merging of two groups approaching the same object from different angles”, they show that MP Mus isn’t so boring after all.
[Image description: This is an observation from the ALMA telescope, showing two versions (side-by-side) of a protoplanetary disc. Both discs are bright, glowing yellow-orange objects with a diffused halo against a dark background. The right disc is more smooth and blurry looking. The left disc shows more detail, for example gaps and rings within it.]
Source: ESO
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By European Space Agency
Week in images: 30 June - 4 July 2025
Discover our week through the lens
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By NASA
Artist’s concept of the star HIP 67522 with a flare erupting toward an orbiting planet, HIP 67522 b. A second planet, HIP 67522 c, is shown in the background. Janine Fohlmeister, Leibniz Institute for Astrophysics Potsdam The Discovery
A giant planet some 400 light-years away, HIP 67522 b, orbits its parent star so tightly that it appears to cause frequent flares from the star’s surface, heating and inflating the planet’s atmosphere.
Key Facts
On planet Earth, “space weather” caused by solar flares might disrupt radio communications, or even damage satellites. But Earth’s atmosphere protects us from truly harmful effects, and we orbit the Sun at a respectable distance, out of reach of the flares themselves.
Not so for planet HIP 67522 b. A gas giant in a young star system – just 17 million years old – the planet takes only seven days to complete one orbit around its star. A “year,” in other words, lasts barely as long as a week on Earth. That places the planet perilously close to the star. Worse, the star is of a type known to flare – especially in their youth.
In this case, the proximity of the planet appears to result in fairly frequent flaring.
Details
The star and the planet form a powerful but likely a destructive bond. In a manner not yet fully understood, the planet hooks into the star’s magnetic field, triggering flares on the star’s surface; the flares whiplash energy back to the planet. Combined with other high-energy radiation from the star, the flare-induced heating appears to have increased the already steep inflation of the planet’s atmosphere, giving HIP 67522 b a diameter comparable to our own planet Jupiter despite having just 5% of Jupiter’s mass.
This might well mean that the planet won’t stay in the Jupiter size-range for long. One effect of being continually pummeled with intense radiation could be a loss of atmosphere over time. In another 100 million years, that could shrink the planet to the status of a “hot Neptune,” or, with a more radical loss of atmosphere, even a “sub-Neptune,” a planet type smaller than Neptune that is common in our galaxy but lacking in our solar system.
Fun Facts
Four hundred light-years is much too far away to capture images of stellar flares striking orbiting planets. So how did a science team led by Netherlands astronomer Ekaterina Ilin discover this was happening? They used space-borne telescopes, NASA’s TESS (Transiting Exoplanet Survey Satellite) and the European Space Agency’s CHEOPS (CHaracterising ExoPlanets Telescope), to track flares on the star, and also to trace the path of the planet’s orbit.
Both telescopes use the “transit” method to determine the diameter of a planet and the time it takes to orbit its star. The transit is a kind of mini-eclipse. As the planet crosses the star’s face, it causes a tiny dip in starlight reaching the telescope. But the same observation method also picks up sudden stabs of brightness from the star – the stellar flares. Combining these observations over five years’ time and applying rigorous statistical analysis, the science team revealed that the planet is zapped with six times more flares than it would be without that magnetic connection.
The Discoverers
A team of scientists from the Netherlands, Germany, Sweden, and Switzerland, led by Ekaterina Ilin of the Netherlands Institute for Radio Astronomy, published their paper on the planet-star connection, “Close-in planet induces flares on its host star,” in the journal Nature on July 2, 2025.
Keep Exploring Discover More Topics From NASA
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Explore This Section Exoplanets Home Exoplanets Overview Exoplanets Facts Types of Exoplanets Stars What is the Universe Search for Life The Big Questions Are We Alone? Can We Find Life? The Habitable Zone Why We Search Target Star Catalog Discoveries Discoveries Dashboard How We Find and Characterize Missions People Exoplanet Catalog Immersive The Exoplaneteers Exoplanet Travel Bureau 5 Ways to Find a Planet Strange New Worlds Universe of Monsters Galaxy of Horrors News Stories Blog Resources Get Involved Glossary Eyes on Exoplanets Exoplanet Watch More Multimedia ExEP View the full article
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By European Space Agency
Week in images: 23-27 June 2025
Discover our week through the lens
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