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.
Icy Comets Orbiting a Star Like Our Sun Spotted for the First Time
The Hitomi Satellite Briefly Glimpsed the Universe, Then Died — What Happened?
Nuclear Pasta Is the Super-Macaroni of the Universe
Back in 2006, the International Astronomical Union decided to demote Pluto to the status of a dwarf planet. A new historical study challenges that designation.
By Patrick J. Kiger Oct 16, 2018
It's a small world with an astonishingly long orbit around our sun. And it could lead us to the fabled Planet X.
By Ian O'Neill Oct 10, 2018
Every autumn, Earth passes through a stream of debris left by Halley's comet, resulting in nighttime meteor showers in mid-October. Best time this year is Oct. 21-22.
By Patrick J. Kiger Oct 3, 2018
It dashed through our solar system like a cigar-shaped signal from another star system. But which one? Astronomers are on the case.
By Ian O'Neill Oct 1, 2018
Do they even look different?
By Mark Mancini Sep 28, 2018
Jupiter has been notoriously bad about revealing any water deep in its thick atmosphere. That's changing though.
By Ian O'Neill Sep 7, 2018
Comet 21P and comet 46P will swing past our planet during the month of September — and you won't need a telescope to see either.
By Mark Mancini Sep 4, 2018
It's a celestial gift in the middle of August. Just look up. At night.
By Christopher Hassiotis Aug 9, 2018
But don't buy your lakefront property just yet.
By Patrick J. Kiger Aug 7, 2018
Scientists recently found 12 more moons revolving around Jupiter, bringing its total to 79. Why does Jupiter have so many darn moons? Is there any advantage to that?
By Mark Mancini Jul 27, 2018
It's the second lunar eclipse of 2018, but it will last longer than any other during the 21st century.
By Mark Mancini Jul 16, 2018
Mars Close Approach is July 31, 2018. That is the point in Mars' orbit when it is nearest to Earth.
By Laurie L. Dove Jul 10, 2018
The days are getting longer, but don't worry about changing your clocks.
By Chris Opfer Jul 3, 2018
To define the location of objects in the sky, astronomers utilize a system of celestial coordinates, which extends latitude and longitude from Earth's surface into space.
By Patrick J. Kiger Jun 13, 2018
Once upon a time, the sun caught an interstellar orphan and adopted it as its own. It's named 2015 BZ 509.
By Ian O'Neill May 23, 2018
Europa might be ready to let us in on a secret.
By Ian O'Neill May 17, 2018
Some scientists think the existence of plate tectonics could be a prerequisite for life. So do they exist on other planets outside of Earth?
By Mark Mancini May 9, 2018
Astronomers have just discovered a gas in Uranus' clouds that does nothing to help the planet being taken seriously.
By Ian O'Neill Apr 24, 2018
It's been a while since the sun has hung out with its brothers and sisters in the same stellar nursery, but they're definitely out there, and citizen scientists can help find them.
By Ian O'Neill Apr 23, 2018
No one knew exactly what the deal was with ureilites, a rare type of meteorite, until now.
By Ian O'Neill Apr 20, 2018
Take that, stars!
By Ian O'Neill Apr 12, 2018
Yep, 'Oumuamua was probably kicked out of its own star system by an overbearing gas giant like Jupiter.
By Ian O'Neill Mar 30, 2018
Everyone's heard of the blue moon and the harvest moon, but did you know every single moon of the year has a name? Who named them and what do the names mean?
By Nathan Chandler Mar 30, 2018
Scholz's star buzzed our solar system back when humans and Neanderthals roamed the planet. Turns out that encounter may have shaken up a whole bunch of comets.
By Ian O'Neill Mar 23, 2018
Beneath Jupiter's famous swirls and stripes is an environment that's completely unlike anything on Earth.
By Ian O'Neill Mar 9, 2018
10 Essential Supreme Court Cases of Ruth Bader Ginsburg
What Is Einstein's 'God Letter'?
If the Light Is Stuck on Red, Are You Stuck Too?