Outer Space
Why astronomers are excited about carbon dioxide and methane in the atmosphere of an alien world
Scientists reported chemical traces in the atmosphere of planet K2-18b, including a substance which on Earth is only produced by living things.
Spending time in space can harm the human body − but scientists are working to mitigate these risks before we go to Mars
With NASA planning more missions to space in the future, scientists are studying how to mitigate health hazards that come with space flight.
Astronomers spot the first “bounce” in our Universe
Imprinted in the structure of the universe are "bouncing" signals from early on: where gravitating normal matter was pushed out by radiation.
Evidence suggests the world’s largest known asteroid impact structure is buried deep in southeast Australia
After years of asteroid impact research, experts think the world’s largest known impact structure is buried deep in the earth in Australia.
SpinLaunch will hurl payloads into orbit, cutting the cost of launch by 20x
Rockets are big because they require enormous amounts of fuel. SpinLaunch’s method does away with much of that by hurling payloads into space.
“Ghostly” neutrinos help us see our Milky Way as never before
A unique photograph of the Milky Way galaxy was captured using the IceCube detector, which observes high-energy neutrinos from space.
Why aliens are likely to be AI
Fundamental biological limitations will make long-distance space travel all but impossible for organisms. AI is more suitable.
5 revolutionary cosmic ideas that turned out to be wrong
These ideas could have revolutionized our concept of the Universe, but since evidence paves the road to reality, we've had to abandon them.
Time has some fundamental differences from every other dimension
While spacetime itself is four dimensional, it can be decomposed into three spatial dimensions and one time dimension.