Planets

Planets

Scientists Say: Satellite

When we think of satellites, we often think of objects we send into space from Earth. But most satellites are actually all natural.

Planets

Hello, Pluto!

Here's a collection of our stories about your favorite dwarf planet — including those on the New Horizons flyby.

Planets

Visiting Pluto

Pluto has long been little more than a dark spot in the sky. Now NASA’s New Horizons spacecraft is about to fly by this dwarf planet. Along the way, it will collect unprecedented data on it.

Planets

Super-earths not a place for plate tectonics

Plate tectonics build big mountain ranges on Earth. But super-Earths would be too big for such movements to occur, a study finds.

Space

Teen finds exoplanet

Tom Wagg discovered exoplanet WASP-142b while doing an internship. Just 15 at the time, he is possibly the youngest person ever to find an exoplanet.

Planets

Cosmic collision may have given birth to Pluto’s moons

Hubble Space Telescope photos reveal that the Pluto family may have formed from debris left behind after something slammed into the dwarf planet.

Planets

Asteroids boiled young Earth’s oceans

At least two asteroids hit Earth 3.3 billion years ago. This superheated the atmosphere, boiled the oceans and shaped how early life evolved.

Space

Mini-sats: The trick to spying Earth-bound asteroids?

NASA is supposed to begin nonstop screening by 2020 for all asteroids that could pose a threat to Earth. Some astronomers now think the only way to affordably meet that deadline is by using mini-satellites

Planets

Something’s cooking on Saturn’s moon

Grit in one of Saturn’s rings likely formed in hot water on the planet’s ice-covered moon Enceladus. That suggests conditions on this moon might be able to support life.

Planets

Asteroid impacts may have sparked life on Earth

The energy produced by comets and asteroids that collide with Earth may have been strong enough to start life.

Planets

Comet probe may shed light on Earth’s past

Scientists spent more than two decades setting up Philae’s months-long investigation of a comet. What they hope to learn could shed light on Earth’s childhood — and the source of its water. But that’s if problems with Philae’s landing don’t cut the robot’s life span.

Planets

Picture This: Falling to a comet

After a more than decade-long ride, a robotic lander has left its spacecraft and floated down onto the surface of a comet. From there it should begin scouting for hints at how our solar system formed.