The Solar System
In the Solar System Channel, you can explore the planets and celestial objects around our own sun. Learn about topics such as Mars, Jupiter and the Moon.
Constellation Pictures
How to Find Orion's Belt in the Night Sky
Radio Telescope Image Gallery
How do I build a telescope at home?
Shooting the Stars as an Astrophotographer
The Largest Star in the Universe Is 1,700x Bigger Than Our Sun
Twinkle, Twinkle: The Ultimate Stars Quiz
White Dwarfs Can Shred Planets to Pieces
Learn More / Page 5
The wait is over. NASA confirms Mars is seismically active.
The idea of planet Nibiru has captivated doomsday prophets and conspiracy theorists for decades, but nobody has proven its existence. What's the deal?
By Mark Mancini
Scientists are continually discovering more moons orbiting the outer planets, particularly Saturn and Jupiter. Just how many moons does Jupiter have?
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It's a celestial gift in the middle of August. Just look up for a spectacular sight.
Jupiter has been notoriously bad about revealing any water deep in its thick atmosphere. That's changing though.
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The occasional sunspot can interrupt communications here on Earth. But major solar flares have the potential to cause more havoc. Could a flare-up wipe out all our electronics?
Scientists have discovered the existence of water on both our moon and on Mars. Both findings are significant, but what do they mean? Can we use this information to our advantage for space exploration?
By Josh Briggs
It's a bird, it's a plane, it's a supermoon! Aside from being bigger and brighter than a regular moon, does a supermoon affect anything on Earth?
The European Space Agency's Gaia satellite observatory has created a 3-D model of the Milky Way — and beyond! — that charts more than a billion stars.
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Say hello to the newly discovered TRAPPIST-1 system, which is just 39 light-years away and filled with seven Earth-like planets.
The rings of Saturn, Uranus and Neptune may be remnants of smaller planets destroyed long ago by the gas giants' powerful gravity.
And solving that issue could go a long way toward making our planetary neighbor habitable.
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?
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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.
The space telescope's ultraviolet observations come days before the Juno space probe will arrive to orbit the gas giant's polar regions.
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.
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.
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The Quadrantids are a short but powerful meteor shower that shows up in early January. How can you glimpse it?
The four Jovian planets are officially designated as gas (and/or ice) giants. Which planets are they and what makes them so unique?
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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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?
When December's moongazing rolls around, you'll want to take a look at the cold moon, an appropriate moniker if there ever was one.