A new study proposes that the upper mass limit for black holes is even larger than we thought.
Chandrasekhar calculated an upper limit for the mass of a white dwarf, but some white dwarfs can break that limit for a time.
We don’t know much about exoplanets with long orbital periods, but we’re starting to learn.
The true color of stars as we would see them are different than how they are often represented.
Astronomers have found evidence of faint gravitational waves using an array of pulsars in our galaxy.
Using pulsars to measure the motion of the Sun, astronomers can study the mass of our galaxy.
A new study shows that not even cosmology can verify Einstein’s assumption about the speed of light.
A new measure of the cosmic microwave background supports an older universe, and raises more problems for cosmology.