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Curated astronomy indexes
4Astronomy is a search engine built for people who look up. We combine multiple indexes, curated astronomy sources, and AI systems to return results tailored to astronomy topics. Use 4Astronomy to find observing guides, research papers, image archives, mission information, community resources, and products relevant to amateur and professional astronomy. Part of the 4SEARCH network of topic specific search engines.
Latest Articles
French Scientists Create a New Form of Ice at Temperatures That Would Vaporize Steel
1+ hour, 10+ min ago (441+ words) A team of French researchers has produced a previously unconfirmed type of ice that forms not in the cold, but under crushing pressure and heat exceeding 3,600 degrees Fahrenheit. The findings, published in Physical Review Letters, add detail about conditions deep…...
Could the Clues to Ancient Alien Civilizations Be Hiding in a Bucket of Moon Dust?
3+ hour, 35+ min ago (140+ words) Most of our experience with the Search for Extraterrestrial Intelligence (SETI) has been focused on capturing radio signals that alien species have sent out, whether intentionally or unintentionally. That creates a huge “synchronicity” problem - what if there aren’t any alien…...
A website where you can experience what would happen if the speed of light was 5 km/h.
5+ hour, 56+ min ago (171+ words) It is believed that when traveling at near-light speed, the colors of the surroundings and the shapes of objects appear to change. A web application called 'Relativity Park' has been released that allows you to experience 'how the world looks…...
Early-Universe Plasma May Have Kept Dark Photons From Heating the Cosmos
5+ hour, 29+ min ago (282+ words) Dark photons are one proposed explanation for dark matter. A new calculation suggests that the early universe’s plasma may have stopped them from depositing heat as efficiently as earlier models predicted. The post Early-Universe Plasma May Have Kept Dark Photons…...
Scientists Accurately Measure Diamond's Melting Point, Revealing Previous Estimates Were Off by 1,300 Degrees Fahrenheit
5+ hour, 52+ min ago (355+ words) Home » Science » Scientists Accurately Measure Diamond’s Melting Point, Revealing Previous Estimates Were Off by 1,300 Degrees Fahrenheit In a groundbreaking study, scientists have successfully melted diamonds using a powerful laser, achieving highly precise measurements of the mineral’s elusive melting point. Their…...
This Maine Museum Lets You Hold Pieces Of The Moon And Mars In Your Hands
4+ day, 5+ hour ago (1540+ words) Holding a piece of the Moon sounds like something reserved for astronauts, yet one small museum in western Maine lets visitors get surprisingly close to that experience. Inside the two-floor building, colorful tourmaline glows beneath display lights while pull-out drawers…...
Space News: ‘Beyond the limit’ — one million satellites and mirrors in space pose grave threat to the night sky - Lake County News,California
7+ hour, 8+ min ago (1014+ words) LAKE COUNTY NEWS REPORTS A recent European Southern Observatory, or ESO, study has found that current proposals to launch over 1.7 million satellites into orbit, including extremely bright ones, would have “devastating consequences for astronomy.” According to the study, no more…...
Einstein Probe X-Ray Flash: What Powered This Supernova?
8+ hour, 29+ min ago (476+ words) A sub-threshold Einstein Probe X-ray flash was found after ZTF spotted supernova SN 2025wkm. Researchers link the signal to shock breakout and a possible magnetar-powered engine. EP250827b was a soft X-ray flash that lasted more than 1,000 seconds. Spectral fits put its peak…...
What if dark energy is evolving? Comprehensive new dataset questions a core assumption
12+ hour, 33+ min ago (411+ words) starlust.org What if dark energy is evolving? Comprehensive new dataset questions a core assumption For the first time, astronomers have assembled a catalog containing nearly 3,000 exploding stars. And now, all those stars are pointing them toward something they weren’t…...
New simulations suggest the moon formed just 5 hours after Earth slammed into protoplanet Theia
11+ hour, 10+ min ago (552+ words) Earth's moon may have formed far faster than scientists once believed, with new simulations suggesting it came together in as little as five hours after a catastrophic collision. That unexpectedly short timeline could reshape researchers' understanding of one of the…...