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Astrophysics
The Universe has asymmetries, but that's a good thing. Imperfections are essential for the existence of stars and even life itself.
As viewed by the MeerKAT telescope, this radio view of the Milky Way blows away every other way we've ever seen our home galaxy.
There really might be extraterrestrials out there, attempting to make contact. Here's how science, not fiction, is attempting to find them.
Einstein's theories of relativity faced fierce opposition. One critic claimed he was attempting to subvert the scientific method.
With launch costs dropping and enormous numbers of new satellites filling the sky, can't we just do it all from space?
There are ~400 billion stars in the Milky Way, and ~2 trillion galaxies in the visible Universe. But what if we aren't typical?
From physics and alchemy to theology and eschatology, Isaac Newton’s research was rooted in a personal pursuit of the Divine.
The Universe is supposed to be the same everywhere and in all directions. So what's that giant "cold spot" doing out there?
Just 12 million light-years away, the galaxies Messier 81 and 82 offer a nearby preview of the Milky Way-Andromeda merger.
Is the Universe finite or infinite? Does it go on forever or loop back on itself? Here's what would happen if you traveled forever.
Besides offering an incredibly cool way to get stuff into space, SpinLaunch promises to reduce the cost of a launch by 20-fold.
There are an estimated two trillion galaxies within the observable Universe. Most are already unreachable, and the situation only gets worse.
Hubble's deepest views of space revealed fewer than 10% of the Universe's galaxies. James Webb will change that forever.
Shooting star or piece of space dust?
In terms of the planets we've discovered, super-Earths are by far the most common. What does that mean for the Universe?
It is time to give the Russian cosmologist the credit he deserves.
With a new telescope on the horizon, we reflect on the best pictures of space that came before.
If you want to understand what the Universe is, how it began, evolved, and will eventually end, astrophysics is the only way to go.
In 1990, we only knew of the ones in our Solar System. Today, we know of thousands, and that's just the tip of the iceberg.
On December 19 1972, astronauts Eugene Cernan, Harrison Schmitt and Ronald Evans splashed down safely in the Pacific Ocean, ending the Apollo 17 lunar mission. They were the last people to travel […]
Coupled with 3D printing, biomining the Moon or Mars with microbes could sustain human colonies without constant re-supply from Earth.
The search for worlds outside our solar system has just turned up a planet, TOI-2257 b, with a truly extreme orbit.
We frequently say it's 2.725 K: from the light left over all the way from the Big Bang. But that's not all that's in the Universe.
The James Webb Space Telescope finally could answer the age-old question of whether we are alone in the universe.
There are two fundamentally different ways of measuring the Universe's expansion. They disagree. "Early dark energy" might save us.
The first supernova ever discovered through its X-rays has an enormously powerful engine at its core. It's unlike anything ever seen.
The Solar System isn't a vortex, but rather the sum of all our great cosmic motions. Here's how we move through space.
Some stars burn through their fuel as expected, and die of natural causes. But others, instead, get murdered. Here's their story.
Space missions in 2022 will include massive rockets and asteroid collisions. This is also the year space tourism starts to hit its stride.
A levitating vehicle might someday explore the moon, asteroids, and other airless planetary surfaces.