Big Bang theory is the leading explanation for how our universe began. According to the theory, the entire universe began as a tiny singularity that went through an explosive expansion 13.8 billion years ago, gradually expanding into the cosmos we see today. Today, astronomers can detect an "echo" from the Big Bang in the cosmic microwave background, a phenomenon that can be detected with radio telescopes. Big Bang Theory is also the name of a popular CBS sitcom about scientists, where several real-life scientists and astronauts have appeared.
Gravity waves, gravitational waves and primordial gravitational waves... what do they mean? Is there a difference?
The Dark Ages Radio Explorer (DARE) mission would dodge Earth's noisy, disruptive environment to shine some light on the universe's early "dark ages" — with a little help from Earth's moon.
An enormous gas cloud in the early universe has a very small amount of the heavy elements that would form in later stellar generations, suggesting that it was "polluted" by the very first stars.
So are we likely to ever find gravitational waves? And would they really provide irrefutable evidence for the Big Bang? Here are five common myths and misconceptions about gravitational waves.
With the help of a natural telescope, Hubble peered back in time to some of the earliest galaxies, many of which played a significant role in making the universe what it is today.
Mathematician and painter Ed Belbruno says his work in cosmology has made his art even more strange and abstract — or maybe it's his art that's influencing his science.
Although time machines remain a sci-fi fantasy, the vast distances of the universe make it possible to peer back in time and see things as they appeared billions of years ago.
The most luminous galaxies in the universe likely formed slowly via gradual accretion of gas, rather than rapidly via mergers with other galaxies, new research suggests.
The slow death of the universe was revealed in 21 wavelengths, as scientists map the energy of a nearby region of space.
Astronomers have found what looks like a population of the very first stars ever formed in the universe, forged from hydrogen created in the Big Bang.