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Could astronauts travel to Mars on nuclear-powered rockets? These scientists want to make it happen

September 25, 2025
Space missions in the future could travel to Mars, asteroids and the outer solar system by riding on nuclear-powered rockets, thanks to a new design that utilizes energy from the nuclear fission of liquid uranium to heat propellant. The exciting potential of the new technology, which is called a centrifugal nuclear thermal rocket (CNTR), can be neatly summed up by its specific impulse, which…
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How do particle colliders work?

September 24, 2025
Particle accelerators, also known as particle colliders or atom smashers, have been responsible for some of the most exciting physics findings over the past century, including the discovery of the elusive Higgs boson, the fundamental force-carrying particle of the Higgs…
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This new NASA astronaut candidate has already been to space

September 24, 2025
One of NASA’s newly announced astronaut candidates already has a spaceflight under her belt. On Monday (Sept. 22), the space agency announced the 10 members of its newest astronaut class — five men and five women who will train for potential missions to commercial space stations in Earth orbit, at the moon and (perhaps) on Mars. One of the 10 is Anna Menon, who already has extensive…
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See the sun transform into a fiery crescent in breathtaking photos of the September 2025 partial solar eclipse

September 23, 2025
A partial solar eclipse swept across the face of the sun on Sept. 21, mesmerizing stargazers with a dramatic display of orbital mechanics that saw the curved silhouette of the lunar disk turn the incandescent orb of our parent star into a fiery crescent over the Pacific Ocean. The Sept. 21 partial solar eclipse occurred as the moon traveled between Earth and the sun, blocking the disk of our…
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Astronomers discover rare 'runaway' dwarf galaxy hiding a violent past

September 22, 2025
Astronomers have discovered a tiny, ghostly galaxy in a remote corner of the universe, likely a cosmic castaway flung from its original galactic group billions of years ago and left to wander in near-total isolation. The discovery provides rare observational evidence that some galaxies now found in isolation may actually be survivors of violent ejections from dense galactic groups. Shaped by…
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