NASA scientists have analysed the water signatures in Mars' atmosphere to determine that the planet once had a primitive ocean bigger than the Arctic Ocean on Earth.
The Solar Dynamics Observatory celebrates five years of sun-worshipping by releasing its impressive 100 millionth image of our closest star.
One of the most powerful black holes in the observable universe has been revealed by NASA's Chandra X-Ray Observatory.
From galaxies to moonrises, the Astronomy Photographer of the Year images offer stunning views of the universe.
The stunning result of a comet streaking across the lens of the 570-megapixel Dark Energy Camera could make backyard astronomers green with envy.
Hot tubes of plasma align on the sun's surface in a flower-like pattern to provide a gorgeous view captured at New Jersey's Big Bear Solar Observatory.
To celebrate the work being done by its Solar Dynamics Observatory, NASA has released a video of highlights on the fifth anniversary of its launch.
A lone-wolf comet buzzes the sun and surprises researchers by making it around to the other side.
You might not have realized that sprites are real, but this new photo taken at the Paranal Observatory in Chile proves otherwise -- sort of.
The Sphere instrument on the VLT in Chile peers with all its might into the blackness around a binary star system and returns a surprise for astronomers.