The “Wow!” signal has been etched red marker in the memory of advocates for the search for extraterrestrial intelligence (SETI) since its unveiling in 1977. To this day, it remains one of the most enigmatic radio frequency signals ever found. Now a new paper from a wide collection of authors, including some volunteers, provides some corrections, and some new insights, into both the signal and its potential causes.
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Live coverage: SpaceX preps for Starship Flight 10 following Sunday scrub
Several people wander the dunes surrounding Launch Pad A at Starbase, Texas, to marvel at the fully integrated Starship rocket designed to launch Starship Flight 10. Image: Stephen Clark / Ars Technica
SpaceX is preparing for its second attempt to launch the 10th test flight of a Starship rocket from southern Texas as soon as Monday evening, but first its needs to fix an issue with its liquid oxygen system at the launch site.
Could black hole mergers finally solve the Hubble tension? Probably not
Astronomers just ruled out merging black holes as a possible solution to a giant discrepancy plaguing cosmology.
Venus quiz: How much do you know about this hottie?
This quiz will test your knowledge of Venus' wild weather, strange geology, and mythological roots.
Supernova blast sculpts ghostly hand-shaped nebula in the cosmos (video)
An image from NASA's Chandra X-ray observatory shows a glowing hand stretching across the cosmos with its palm and fingers sculpted from the wreckage of a massive stellar explosion.
Eclipse experts' best travel tips for the total solar eclipse 2027
Find expert weather insights and travel advice in this essential guide to the 2027 total solar eclipse in Spain, Egypt and North Africa.
Dark matter could create black holes that devour exoplanets from within
Dark matter could gather at the heart of Jupiter-sized worlds, eventually creating a black hole that eats its way out of its exoplanet host.
Cargo ship docks with International Space Station
An unpiloted SpaceX Dragon capsule loaded with 2.5 tons of supplies, research material and needed equipment approaches the International Space Station over western Africa. Image: Sen 4K camera
An unpiloted SpaceX cargo ship docked at the International Space Station early Monday, delivering more than 5,000 pounds of equipment and supplies including 1,500 tortillas, the crumb-free bread substitute for crews dining in weightlessness.
Don't miss Mars close to the slender crescent moon at sunset on Aug. 26
The crescent moon will be positioned close to Mars soon after sunset on Aug. 26
Radio dish on the move | Space photo of the day for Aug. 25, 2025
It makes it easier to drive an extremely heavy radio dish when you can do it remotely.
ESA data records help underpin climate change report
According to the newly released 35th State of the Climate report, 2024 saw record highs in greenhouse gas concentrations, global land and ocean temperatures, sea levels, and ocean heat content. Glaciers also suffered their largest annual ice loss on record. Data records from ESA’s Climate Change Initiative helped underpin these findings.
Finding Life Using Old Instruments In New Ways
Using scientific instruments in novel ways is a common practice, but still results in significant new discoveries. But sometimes, it doesn’t happen so much as a “that’s funny” moment as an intentional new use of old equipment. A new paper from researchers that Imperial College London (ICL), PhD student Solomon Hirsch and his advisor Mark Sephton, shows how the gas chromatograph-mass spectrometers that have been a mainstay of Martian probes since the Viking era could be used to find extant life there.
60-Second Astro News: Light Pollution, Birds, and Zambuto Mirrors
In this roundup of recent news, birds react to light pollution and a respected mirror maker calls it a day.
Juice team resolves anomaly on approach to Venus
The European Space Agency’s Jupiter Icy Moons Explorer (Juice) is on track for its gravity-assist flyby at Venus on 31 August, following the successful resolution of a spacecraft communication anomaly that temporarily severed contact with Earth.
NASA's Psyche asteroid probe beams home haunting view of distant Earth (photo)
NASA's Psyche spacecraft, which is headed toward a big and bizarre metal asteroid, has delivered a stunning perspective of our home planet from deep space.
SpaceX calls off critical Starship Flight 10 test launch due to 'issue with ground systems'
SpaceX scrubbed the planned 10th test flight of its Starship megarocket today (Aug. 24), citing a problem with ground systems at its Starbase site in South Texas.
SpaceX scrubs crucial 10th test flight of Starship
File photo of Starship rising from its launch pad at Starbase in South Texas. Image: Adam Bernstein/Spaceflight Now.
Update Aug. 24, 7:30 p.m. EDT: SpaceX scrubbed the launch attempt due to a ground systems issue.
How the Apollo Missions Unlocked the Origins of the Moon
You know, if you think about it, and trust me we’re about to, the Moon is kind of weird. Of all the terrestrial worlds of the solar system, we’re the only one with a substantial natural satellite. Mercury and Venus have nothing. And while Mars technically has two moons, they’re really just captured asteroids and don’t really count. Sorry Phobos and Deimos, but that’s the way it is.
NASA Researchers Show How Ceres Could Have Once Been Habitable
When NASA's Dawn mission arrived at Ceres in 2015, scientists and the general public got their first detailed look at this strange and beautiful planetoid. As the largest object in the Main Asteroid Belt, accounting for more than 39% of its total mass, Ceres is the only object in the Belt that has undergone hydrostatic equilibrium (aka. became round under the influence of its own gravity). The data Dawn obtained between 2015 and 2018, when the mission ran out of fuel, revealed some very interesting things about this mysterious, icy planetoid.
Watch SpaceX Dragon cargo capsule arrive at the ISS on Aug. 25 with 5,000 pounds of supplies
A SpaceX cargo ship is scheduled to arrive at the International Space Station on Monday morning (Aug. 25), and you can watch the rendezvous live.
