A spider stellar engine could move binary stars halfway across a galaxy
Eventually, every stellar civilization will have to migrate to a different star. The habitable zone around all stars changes as they age.
If long-lived technological...
How did supermassive black holes get so big, so early
Supermassive Black Holes (SMBHs) can have billions of solar masses, and observational evidence suggests that all large galaxies have one at their centres.
However, the...
A space mission to Triton and Neptune would unlock their mysteries
A town in the Austrian Alps might not seem like the most conducive place to come up with daring space missions.
But, for the last...
Scientists watch ‘dancing’ electrons after neutron star collision
Astrophysicists have observed an extraordinary event following the collision of two neutron stars—the explosive birth of a black hole and the intense "dance" of...
Asteroid dust unveils the mysterious magnetic origins of our solar system
Tiny grains from the asteroid Ryugu are helping scientists uncover secrets about how the outer regions of our solar system formed over 4.6 billion...
A trash compactor is going to the space station
Astronauts on the International Space Station generate their share of garbage, filling up cargo ships that then deorbit and burn up in the atmosphere.
Now...
A star disappeared in Andromeda, replaced by a black hole
Massive stars about eight times more massive than the Sun explode as supernovae at the end of their lives.
The explosions, which leave behind a...
An explanation for rogue planets. They were eroded down by hot stars
The dividing line between stars and planets is that stars have enough mass to fuse hydrogen into helium to produce their own light, while...
Flowing Martian water was protected by sheets of carbon dioxide
Mars’ ancient climate is one of our Solar System’s most perplexing mysteries. The planet was once wet and warm; now it’s dry and cold.
Whatever...
You can build a home radio telescope to detect clouds of hydrogen in the...
If I ask you to picture a radio telescope, you probably imagine a large dish pointing to the sky, or even an array of...