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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
OPINION: Don't give up on Perseverance
15+ min ago (883+ words) Editor's note: All opinions, columns and letters reflect the views of the individual writer and not necessarily those of the IDS or its staffers. In February 2012, the future of NASA’s Mars Exploration program looked bleak. The Obama administration’s 2013 budget request…...
Researchers modelling the long-term effects of engineered aerosol warming on Mars found that every 20 degrees of global warming increased atmospheric water vapour tenfold in their simulation. The resulting clouds warmed low-latitude nights by up to 10 degrees but cooled daytime temperatures across the winter midlatitudes by as much as 40 degrees—an unintended consequence omitted from earlier dry-atmosphere models.
15+ min ago (1058+ words) A water-cycle simulation of aerosol-warmed Mars found tenfold vapour increases per 20 kelvin, with clouds warming nights, cooling winter days and preserving effects after shut-off. By Deep Field · Edited by Lachlan Brown Published September 13, 2026 · How we edit A proposed aerosol intervention…...
Kyushu University Finds Quantum Gravity Tests May Mirror Normal Gravity
1+ hour, 48+ min ago (187+ words) Associate Professor Joshua Foo of Kyushu University’s Institute for Advanced Study explains that many proposed experiments seeking to reveal quantum gravity may not be as definitive as initially thought. “Rather, it helps us identify which experimental signatures would genuinely require…...
Star Watch: Venus and the Moon Highlight the Sky This Week
4+ hour, 18+ min ago (23+ words) Yahoo Star Watch: Venus and the Moon Highlight the Sky This Week...
Scientists: Mercury’s shrinkage accelerating | Northwest Arkansas Democrat-Gazette
2+ day, 13+ hour ago (31+ words) CAPE CANAVERAL, Fla. -- A new study shows that little, wrinkly Mercury may be shrinking faster than expected, the cosmos' version of a grape shriveling into a raisin under the sun....
Earth’s moon may have formed nearly whole just hours after a giant crash
1+ hour, 39+ min ago (504+ words) New simulations suggest the moon may have formed almost instantly after a giant impact, not slowly from a debris disk....
From meteor showers to a supermoon: 5 spectacular night sky events to watch out for this autumn - BusinessToday
1+ hour, 15+ min ago (608+ words) The night sky is set to get busier as autumn arrives, with several celestial events lined up over the next few months. From meteor showers that can be seen without a telescope to a rare gathering of four planets and…...
Mercury May Be Shrinking Faster Than Scientists Thought
3+ hour, 35+ min ago (556+ words) Greek PM Kyriakos Mitsotakis and Emmanuel Macron discuss the space mission as well as GSI, Hormuz crisis and regional developments during Paris meeting New research indicates that Mercury, the solar system’s smallest planet, might be contracting more dramatically than previously…...
Fall stargazing 2026: The best skywatching sights in autumn (and how to see them)
1+ hour, 21+ min ago (1502+ words) As longer nights draw in over the fall, we see the return of some stargazing favorites, including the Andromeda Galaxy, the Pleiades star cluster and the first supermoon of the season. With fall now upon us, many of us will…...
The Copernican principle: De-centering Earth and de-centering humanity - Lutheran Alliance for Faith, Science and Technology
1+ hour, 35+ min ago (1285+ words) by Ted Peters | Sep 13, 2026 | Features Are we earth-born terrans sinfully arrogant when we sanction geocentrism? Do we Homo sapiens express too much pride or hubris when we place ourselves atop the food chain and subject all other life forms to…...