Outer Space

When Mars samples arrive, they may carry more than knowledge. To offset the chance of a Martian pandemic, NASA is learning to contain a Red Planet plague.

From here to the limits of what we can see, here's a breathtaking illustrated logarithmic view of the Universe.

There are between 6 and 20 trillion galaxies out there. Carl Sagan's "billions and billions" was far too low of a guess.

When we measure it, we find that our Universe really is flat. Here's what we can learn from that, and why it matters so much.

The first ocean planet may have just been discovered in the “Goldilocks zone” of a star 100 light-years from Earth.

Today, the fastest-ever nova to fall off has been discovered, and even faster ones may be out there. What comes next?

NASA scientists have “remixed” the incredibly deep sounds emitted by a black hole 240 million light-years away.

The mega drive might provide enough thrust for a spacecraft to travel near the speed of light using only electricity, says one physicist.

An analysis of the gravitational wave data from black hole mergers show that the event horizon area, and entropy, always increases.

The James Webb Space Telescope's first set of science images showcases the breadth of the observatory’s capabilities.