Outer Space

Ring galaxies, the rarest in the Universe, finally explained
A far-out plan to build an asteroid city
China’s new space station is open for business
“Galactic archeology” makes spectacular find: the Milky Way is over 13 billion years old
An Earth-sized planet found in the habitable zone of a nearby star
Are we living in a baby universe that looks like a black hole to outside observers?
Ancient killer asteroid created a megatsunami on Mars
What the new Earth-threatening asteroid means for humanity
What is the largest planet out of all the ones we know?
Chernobyl fungus could shield astronauts from cosmic radiation