Search
Space
Thanks to observations of gravitational waves, scientists were able to settle a longstanding debate over the speed of gravity.
Since JWST first glimpsed the Universe, we've entered a new era in understanding the earliest objects in the Universe. What have we learned?
U.S. particle physicists recently recommended a list of major research projects that they hope will receive federal funding.
Each December, the Geminid meteor shower puts on a show for skywatchers across Earth. With a new Moon at 2023's peak, it'll be outstanding!
Your life’s memories could, in principle, be stored in the universe’s structure.
In 2022, Hubble owned the record for most distant galaxy. Today, that galaxy is down to the 9th most distant object. Thanks, JWST.
In the earliest stages of the hot Big Bang, equal amounts of matter and antimatter should have existed. Why aren't they equal today?
In 1667, a core-collapse supernova happened right here in the Milky Way, invisible to all humans. ~350 years later, here's what JWST sees.
When we look at our Sun, its properties are incredibly constant, varying by merely ~0.1% over time. But all stars don't play by those rules.
All matter particles can act as waves, and massless light waves show particle-like behavior. Can gravitational waves also be particle-like?
Everything we observe beyond our Local Group is speeding away from us, omnidirectionally. If the Universe is expanding, where is the center?
In 1054, a core-collapse supernova occurred 6500 light-years away. In 2023, JWST imaged the remnant, and might solve a massive mystery.
12mins
When black holes disappear, what happens to the stuff that fell in? Physicist Brian Cox explains.
There's a quantum limit to how precisely anything can be measured. By squeezing light, LIGO has now surpassed all previous limitations.
Hermann Minkowski called Einstein a "lazybones" with a "not very solid" education. Less than 10 years later, he would eat his words.
Between the least massive star and most massive planet lies the mysterious brown dwarf: a class of objects that are neither star nor planet.
From the Big Bang to black holes, singularities are hard to avoid. The math definitely predicts them, but are they truly, physically real?
Isaac Newton and Albert Einstein are locked in an eternal battle over the nature of gravity. Whose side are you on?
In the largest star-forming region close to Earth, JWST found hundreds of planetary-mass objects. How do these free-floating planets form?
Space weather poses a tremendous threat to all satellites, knocking all computer systems offline. Is that a recipe for Kessler syndrome?
Some fascinating observations of K2-18b have come along with horrendous, speculative communications. There's no evidence for oceans or life.
5mins
NASA’s Michelle Thaller explains what happens when the densest stars in the galaxy collide.
A more distant galaxy liked the lens so much that it went and put a ring on it. Here's the science behind this remarkable cosmic object.
This measurement is crucial to confirm that one of the assumptions of Einstein’s theory of gravity is valid.
Named "Supernova H0pe," it shows how JWST plus gravitational lensing can be used to solve the greatest puzzle facing astronomy today.
Neutrons can be stable when bound into an atomic nucleus, but free neutrons decay away in mere minutes. So how are neutron stars stable?
Dark matter hasn't been directly detected, but some form of invisible matter is clearly gravitating. Could the graviton hold the answer?
In 1987, the closest supernova directly observed in nearly 400 years occurred. Will a pulsar arise from those ashes? JWST offers clues.
Newton thought that gravitation would happen instantly, propagating at infinite speeds. Einstein showed otherwise; gravity isn't instant.
There are a few clues that the Universe isn't completely adding up. Even so, the standard model of cosmology holds up stronger than ever.