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By NASA
At COSI’s Big Science Celebration on Sunday, May 4, 2025, a young visitor uses one of NASA Glenn Research Center’s virtual reality headsets to immerse herself in a virtual environment. Credit: NASA/Lily Hammel NASA’s Glenn Research Center joined the Center for Science and Industry (COSI) Big Science Celebration on the museum’s front lawn in Columbus, Ohio, on May 4. This event centered on science activities by STEM professionals, researchers, and experts from Central Ohio — and despite chilly, damp weather, it drew more than 20,000 visitors.
At COSI’s Big Science Celebration on Sunday, May 4, 2025, a young visitor steps out of the rain and into NASA Glenn Research Center’s booth to check out the Graphics and Visualization Lab’s augmented reality fluid flow table that allows users to virtually explore a model of the International Space Station. Credit: NASA/Lily Hammel NASA’s 10-by-80-foot tent housed a variety of information booths and hands-on demonstrations to introduce guests to the vital research being performed at the Cleveland center. Popular attractions included a mini wind tunnel and multiple augmented and virtual reality demonstrations. Visitors also engaged through tangram puzzles and a cosmic selfie station. NASA Glenn’s astronaut mascot made several appearances to the delight of young and old alike.
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By European Space Agency
The European Space Agency’s (ESA) newest planetary defender has opened its ‘eye’ to the cosmos for the first time. The Flyeye telescope’s ‘first light’ marks the beginning of a new chapter in how we scan the skies for new near-Earth asteroids and comets.
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By Space Force
The Department of the Air Force has opened a public comment period to detail recent updates to the background and methodology for Support of Military Families 2025 scorecards for spouse employment and public education surrounding DAF installations.
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By NASA
2 min read
Preparations for Next Moonwalk Simulations Underway (and Underwater)
How big is space?
Space is really big. Thinking about our solar system, let’s imagine you could get in a car and drive to Pluto at highway speeds. It would take you about 6,000 years to get there.
When we start to think about other stars outside of our solar system, we need to think about
another unit of distance. This is why astronomers use the unit light-years.
Light travels at 186,000 miles per second. One light year is about 6 trillion miles. The closest star to our Sun is about four light years away.
Our own Milky Way galaxy is about 100,000 light-years across.
We know from deep field images of the universe that there are hundreds of billions, perhaps a trillion other galaxies.
Using some of the deepest images yet from the James Webb Space Telescope, we’ve been able to see galaxies that emitted their light about 13 and a half billion years ago.
Now, here’s a really important thing. Because the universe is expanding, those most distant galaxies are actually much further away than 13 and a half billion light years.
I’m glossing over some math here, but we can estimate that the observable universe is about 92 billion light-years across. But we’re pretty sure that the universe is even bigger than what we can see.
And here’s where things get really weird, we don’t actually know if the universe is finite or infinite.
As much as we’ve learned about the universe, science has no reliable estimate of the actual size of the entire universe.
[END VIDEO TRANSCRIPT]
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Last Updated May 21, 2025 Related Terms
Astrophysics Galaxies, Stars, & Black Holes James Webb Space Telescope (JWST) Science Mission Directorate The Universe Explore More
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