Explore the vast reaches of space and mankind’s continuing efforts to conquer the stars, including theories such as the Big Bang, the International Space Station, plus what the future holds for space travel and exploration.
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There are four others with this unusual honor. While not every other went from space to the Senate like Mark Kelly, their stories are equally as interesting.
Until recently, Arecibo had the biggest radio telescope in the world, and its ability to detect distant signals made it a very powerful tool for studying the universe. It even starred in two movies.
You might call it a Christmas miracle. Jupiter and Saturn will align so closely they may look like a double planet. The last time we saw this was in 1226.
NASA and other agencies have been studying artificial gravity in hopes they will someday use it to help astronauts combat the effects of weightlessness in space. How close are we to that reality?
He stood just 5 feet, 2 inches. But Gagarin cast an enormously long shadow in space exploration, both for his achievements and his mysterious death.
A distant asteroid made mostly of iron is potentially worth $10,000 quadrillion, making it many times more valuable than the global economy.
Every autumn, Earth passes through a stream of debris left by Halley's comet, resulting in nighttime meteor showers in mid-October. The best time this year is Oct. 21.
When you think about space travel, you probably don't take the time to wonder how astronauts go to the bathroom. However, the annals of aeronautic history abound with space bathroom tales. Here are 10 of our favorites.
By Stephanie Watson
Star-gazers gasped when they saw how much Betelgeuse dimmed in 2019 and the reason wasn't clear. Even though it's back up to full strength, how long will it be before it explodes? We haven't seen a supernova in over 400 years.
For decades Bob Lazar talked about a mysterious element 115 that supposedly could power alien spacecraft. People thought he was a nut but scientists discovered element 115 in 2003. Was there any connection?
Other companies, like Amazon and Telesat, are planning to emulate StarLink's model, meaning there could soon be as many as 50,000 satellites, mostly for the purpose of internet service, floating around in space.
It's a celestial gift in the middle of August. Just look up for a spectacular sight.
The Perseverance rover will explore Mars' Jezero Crater, gathering rock samples which may prove that life once existed on the red planet.
Comet NEOWISE comes by only once every 6,800 years. But it will be visible to anyone with binoculars or even to the naked eye. Here's how to spot this rare event.
Watching meteor showers can be a spectacular sight. We talked to some astronomy experts on how to improve your meteor-viewing experience.
Astronomers used Hubble's full range of imaging to dissect wild 'fireworks' happening in two nearby young planetary nebulas.
In 1953, CalTech geochemist Clair Patterson came up with an estimate for Earth's age that still holds today.
For the first time since 2011, NASA will launch astronauts into space from U.S. soil. It will also be the first time ever a private company will get them there.
By Mark Mancini