Space

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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NASA's Spot the Station feature will text or email you when the ISS is about to be overhead. And you won't even need a telescope to see it!

By Laurie L. Dove

The sun's atmosphere is actually hotter than its surface, even though you'd assume the surface is what generates all that heat. How does that work?

By Patrick J. Kiger & Yara Simón

Saturn's largest moon Titan is the only other celestial body we know of that has liquid lakes on its surface. NASA has just captured some amazing footage of clouds.

By Christopher Hassiotis

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Outer planets in our solar system have atmospheres made up of flammable chemicals that can cause explosions on Earth. Could a rocketship, or electric spark, ignite them?

By Patrick J. Kiger

Elton's always maintained that Mars ain't the kind of place to raise your kids. Is he right?

By Julia Layton

The space telescope's ultraviolet observations come days before the Juno space probe will arrive to orbit the gas giant's polar regions.

By Christopher Hassiotis

Precipitation does fall from the clouds of other planets, but it's a little more exotic than the rainwater we get here on Earth. Imagine sheets of methane, sulfuric acid and, yes, diamonds falling from the sky.

By Alison Cooper

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NASA's Mars rover Opportunity's last words were: "My battery is low and it's getting dark."

By Patrick J. Kiger

Back in 2006, the International Astronomical Union decided to demote Pluto to the status of a dwarf planet. A historical study challenges that designation.

By Patrick J. Kiger

The government's secret Advanced Aviation Threat Identification Program has spent millions researching UFOs and alien life. Are they covering up their findings?

By Diana Brown

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?

By David Warmflash, M.D.

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Winter is the perfect time to look for Orion's Belt in the Northern Hemisphere. If you're new to stargazing, we'll show you how to find it.

By Valerie Stimac

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.

By Valerie Stimac & Desiree Bowie

The Quadrantids are a short but powerful meteor shower that shows up in early January. How can you glimpse it?

By Valerie Stimac

A magnetar is a neutron star with a super-strong magnetic field. Astronomers consider them among the scariest objects in the universe, but why?

By Valerie Stimac

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The August 2023 full moon is known as the sturgeon moon. This year, it's also a supermoon and will be followed by a blue moon at the end of the month!

By Melanie Radzicki McManus

Surprisingly, the solar system isn't odorless — it has a distinct scent that some astronauts like and others think is stinky. So, what does it smell like and why?

By Valerie Stimac

Do you love looking at beautiful pictures of the night sky? How do space photographers get those shots? And could you join their ranks?

By Valerie Stimac

And this month's buck moon is extra-special because it is a supermoon!

By Valerie Stimac

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Kepler-186f was the first Earth-sized planet found within its star's habitable zone. But there's still a lot we don't know about it.

By Melanie Radzicki McManus

The four Jovian planets are officially designated as gas (and/or ice) giants. Which planets are they and what makes them so unique?

By HowStuffWorks.com Contributors

Terrestrial planets include the four closest to our sun, including Mercury, Venus, Earth and Mars. What else makes these celestial bodies terrestrial planets?

By Mitch Ryan

Move over Saturn. There are other planets in the solar system surrounded by ring systems.

By Mitch Ryan

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Gliese 581c was one of the first "Earth-like" planets found, back in 2007. It generated a lot of excitement then but what about now?

By Kathryn Whitbourne

Blood moons always bring out the stargazers though they aren't that rare. So what makes blood moons red? And do they differ from lunar eclipses?

By Valerie Stimac