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An artist's illustration of the Parker Solar Probe approaching the sun.

A record-breaking NASA probe circling the sun has found never-before-seen spikes of solar wind and a flipping magnetic field

The Parker Solar Probe's study of the sun's corona and wind could lead to new protections for astronauts and Earth's electric grid.
This artist's concept depicts astronauts and human habitats on Mars.

NASA’s plans for the 2020s include landing humans on the moon, detecting quakes on Mars, and defending Earth from deadly asteroids

One year ago, NASA announced it would send astronauts back to the moon. Since then, new spacecraft and telescopes have filled its plans for the 2020s.
The sun absolutely dwarfs every planet.

A stunning animation by a planetary scientist shows how huge our solar system is — and why that makes it so hard to depict

The planets are so far apart, and the sun is so big, that you wouldn't be able to see anything in an accurate model of the solar system.
A view of Earth taken at 1:07 p.m. EDT on January 15, 2017 by the GOES-16 satellite.

A handful of recent discoveries has transformed our understanding of Earth-like planets in the galaxy. Here’s why Earths might be common.

There could be up to 10 billion Earth-like planets in our galaxy alone. That's good news for astronomers seeking alien life.
Just like the near side of the moon, the far side cycles through day and night phases.

There is no permanent dark side of the moon, and this simple animation by a former NASA scientist explains why

The far side of the moon and the dark side are not the same thing. This animation shows how one is constantly moving, while the other never changes.
Backdropped by New Zealand and the Cook Strait in the Pacific Ocean, astronauts Robert L. Curbeam Jr. (left) and Christer Fuglesang (right) participate in an extravehicular activity (EVA).

Astronauts on the space station see vibrant desert patterns, roiling storms, and volcanic eruptions. These are the best photos ever taken from the ISS...

Astronauts' photos reveal vibrant landscapes and roiling storms. "How can something so beautiful be tolerated by human eyes?" one astronaut said.

Astronauts on the space station see vibrant desert patterns, roiling storms, and volcanic eruptions. These are the best photos ever taken from the ISS...

Astronauts' photos reveal vibrant landscapes and roiling storms. "How can something so beautiful be tolerated by human eyes?" one astronaut said.
Left: Scientists test BRUIE in an arctic lake near Barrow, Alaska in 2015. Right: Saturn's icy moon Enceladus hides a vast ocean below its surface.

NASA is testing an alien-hunting, upside-down underwater rover in Antarctica. It’s one of several plans to explore 2 ocean worlds for signs of l...

NASA is testing the rover in Antarctica, an environment similar to the salty oceans hidden beneath the thick ice crusts of Europa and Enceladus.
Patrick Stewart plays Jean-Luc Picard in the sci-fi space series "Star Trek."

Warp speeds in ‘Star Trek’ are achingly slow, and a simple animation by a former NASA scientist proves it

The animation shows how long it takes the starship Enterprise in "Star Trek" to reach Pluto at warp factors that break the known laws of physics.
An artist's interpretation of a gamma-ray burst.

Scientists detected the brightest light in the universe for the first time, following a mysterious explosion in space

Astronomers had 50 seconds to turn their telescopes toward a violent explosion in a galaxy 4 billion light-years away.