Explore The Planets
Alien Planets Revealed
Are we alone—and if not, what might the inhabitants of far-flung worlds look like?
Amazing Discoveries from Cassini
Are We Alone?
Hunt for clues in the universe to answer one of humanity's biggest questions: Are we alone?
The Evidence for Planet Nine’s Existence
Why do some astronomers think there’s a massive planet on the edge of our solar system?
Inside the Search for Planet Nine
The Subaru Telescope at the peak of Hawai`i’s Mauna Kea is on the hunt for Planet Nine.
The 170-Year Search for a Planet Beyond Neptune
There may be a ninth planet at the edge of our solar system — it’s not Pluto and it’s not “Planet X.”
The life of our solar system told in five dramatic stories spanning billions of years.
The Planets: Ice Worlds
Beyond the bizarre, icy worlds of Uranus and Neptune, Pluto dazzles with its mysterious ocean.
The Planets: Saturn
NASA's Cassini reveals the mysteries of Saturn's rings—and new hope for life on one of its moons.
The Planets: Jupiter
Jupiter's massive gravitational force has made it both a wrecking ball and a protector of Earth.
The Planets: Mars
Before it was a dry planet, Mars was a wet world that may have hosted life.
Finding Life Beyond Earth
Scientists are on the verge of answering one of the greatest questions in history: Are we alone?
Installing aerogel shields on Mars could make the Red Planet more habitable
Human-made shields that block UV rays and concentrate heat on the Martian surface could provide both liquid water and protection from radiation.
Pluto and Beyond
The New Horizons spacecraft zooms toward an object 4 billion miles from Earth.
Five Facts About the Planet Closest to Our Sun
Mercury is more than just the smallest planet in our solar system.
Five Facts About Hot, Volcanic Venus
Getting to know Earth’s next-door neighbor, the second planet from the Sun.
Mars, the Red Planet, Was Once Blue
Mars once had rains, rivers, and in the northern hemisphere, a vast sea—the ingredients necessary for life.
Pluto Shows Its True Colors
Pluto is a celestial oddball in more ways than one. It’s the only (former) planet that boasts a binary system status and Charon, its largest moon, is massive enough that the two bodies rotate around a common center of gravity.
Five Facts About Our Home Planet
Getting to know the planet we inhabit.
K2 Mission Finds 80 Possible Planets in Record Time
Researchers from MIT used an algorithm to quickly identify 80 possible exoplanets amid 50,000 stars.
Behind the Scenes: The Making of "The Planets"
See what went into creating the stunning visuals for NOVA’s “The Planets.”
Death Dive to Saturn
Follow Cassini's final days as it skims the cloud tops before plunging into the planet.
Jupiter, the First Planet to Form in our Solar System
Jupiter formed long before its smaller neighbors.
Five Facts About the Biggest Planet in our Solar System
Jupiter is more than the biggest planet in our solar system—it's also the oldest.
Five Facts About the Ringed Gas Giant Planet
Learn more about Saturn, its rings, and moons.
Astronomers Looking for Planet Nine Discover 12 More Moons Orbiting Jupiter
The small satellites have some seriously funky orbits.
Miles of Water Found on Mars. Could It Support Life?
It might be a breakthrough discovery in the search for extraterrestrial life.
Applause for the demise of a ship is not a typical reaction, but this wasn't a typical voyage.
Five Facts About the Tilted Planet
Uranus is more than just the tilted planet in our solar system.
Liquid Water Found on Mars
The Planets: Inner Worlds
The rocky planets have similar origins, but only one supports life. Was it always this way?