Is the universe infinite? Scientists reveal how vast it really is..
One of the strongest indicators of this limit is the cosmic microwave background radiation, faint afterglow from the…
Observable universe is 93 billion light years wide but what’s beyond it? Here’s what we can’t see…
One of the most important pieces of evidence for this limit is the cosmic microwave background radiation, faint…
Astronomers Uncover “Mysterious Giant” Lurking Behind Binary Black Holes
Binary black hole merger near a supermassive black hole. Credit: SHAO GW190814’s gravitational waves suggest a hidden supermassive…
New Measurements Show We May Live in a Giant “Cosmic Void”
New research suggests we may live in a vast cosmic void, a region with far fewer galaxies and…
Black Holes Are the Elusive Source of the Universe’s Dark Energy, Study Argues
Dark energy—the hypothetical force accelerating our universe’s expansion—sometimes raises more questions than it answers. A new study, however,…
What Came Before the Big Bang? New Study Says ‘Numerical Relativity’ Could Unlock Cosmology’s Biggest Mysteries
It is one of cosmology’s most perplexing questions: what happened before the Big Bang? Although the question has…
Astronomers Discover the Earliest Black Hole Ever Confirmed
An international team of astronomers has identified the earliest black hole ever confirmed, an ancient behemoth that existed…
Radical New Theory Rewrites the Story of the Earliest Universe
Following the Big Bang, our universe expanded at an exponential rate. According to this theory, known as cosmic…
Dozens of ‘Ghost Galaxies’ Are Orbiting the Milky Way, Astronomers Suspect
The Lambda Cold Dark Matter (LCDM) theory suggests that most galaxies are low-mass dwarf galaxies, many of which…
Astronomers Detect a Black Hole Merger That’s So Massive It Shouldn’t Exist
Gravitational waves—ripples in space-time caused by violent cosmic events—travel at the speed of light in every direction, eventually…