The universe has been making stars for a good 13 billion years or so, and a natural question to ask might be “how many stars have existed in that time?” But now astronomers have taken it several steps further and asked “how much light has been emitted in that time?” Using a new measurement method, the team has apparently managed to quantify all the starlight every produced in the observable universe – and the result is a figure that’ll make your eyes water.
Category: space – Page 1,058
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Scientists Discover a “Ghost of a Galaxy” Orbiting the Milky Way
It’s both massive and extremely diffuse.
The “oddball” satellite has astronomers wondering what else they’re missing.
Moon Missions, Ancient Asteroids: Projects Of Pioneering Professor Span The Space Age
50 years of discovery — and he’s not done yet.
Einstein’s Theory of General Relativity Just Survived a Massive Crash in Outer Space
Once again, the decades-old theory of gravity has survived a modern scientific onslaught. Einstein wins again.
Mercury Pollution Is Way Up. One Huge Culprit? Gold Mines
The first big international effort to combat mercury pollution is zeroing in on small gold mines, which account for almost half of annual emissions.
Astronomers Can Finally See This Galaxy Cluster
Explore the Fornax galaxy for the first time.
Scientists Build Atomic Clocks Accurate Enough to Measure Changes in Spacetime Itself
Physicists have created atomic clocks so precise that they can measure deformations in spacetime itself, according to new research.
We don’t all experience time passing equally—time passes more slowly closer to something massive’s gravitational pull, as famously theorized by Albert Einstein. And since gravity is typically interpreted as the way mass warps space itself, that means a precise-enough atomic clock could serve as a scientific tool for measuring how objects change the shape of their surrounding space.
Mars 2020 will look for life in one of three sites
A new Mars rover will look for life—but there’s a fight over where it should search.
