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Astronomers discovered that WASP-17b has an uneven atmosphere, with extreme temperature differences between its morning and evening sides. Planets appear as perfectly round disks when they cross in front of their stars, and astronomers have long measured them that way.
NASA satellite imagery reveals Spider Crater in Western Australia, where an ancient meteorite impact left a remarkable spider-shaped formation. Today’s Image of the Day from NASA Earth Observatory reveals a strange formation in Western Australia that looks remarkably like a…
Chemists tested whether harsh sunlight on early Earth chose DNA and RNA's chemical letters. Some of life's own letters broke down fastest. Life builds its genetic code from just a handful of chemical letters. One theory suggests that harsh sunlight…
A NASA astronaut captured an ancient rock formation in Madagascar made of the same type of rock that covers much of the Moon's bright highlands. Today’s Image of the Day from NASA Earth Observatory features an unusual circular rock formation…
A geologist found an undiscovered meteorite crater in Western Australia on Google Earth in 2007. Later drilling confirmed its iron meteorite origin. In July 2007, geologist Arthur Hickman was scanning satellite images of Western Australia on Google Earth, looking for iron ore.
Stars once thought to provide evidence of hypernovae may instead owe their unusual chemistry to ordinary supernovae that scatter elements unevenly. In recent years, a handful of unusual stars have been cited as evidence for extraordinarily powerful stellar explosions called…
Enceladus' ocean spray freezes slowly and shatters into grains that each carry mostly one salt, which could make signs of life easier to spot. To study an ocean, you’d usually have to go there. Enceladus, a small icy moon of…
ESA's new Sentinel-3C satellite reveals Italy's snow-covered Alps, colorful coastal waters, and diverse landscapes in a stunning first image. Today’s Image of the Day from the European Space Agency features a remarkable satellite view of Italy captured on September 30, 2026. Italy’s…
The farthest fast radio burst yet came from a tiny, young galaxy, a clue that magnetars may set off at least some of these brief flashes. Astronomers call them fast radio bursts, or FRBs. The radio waves in this one…
Chang'e-6 soil from the Moon's far side holds pure γ-Fe, a form of iron never seen in lunar samples, and it can keep a magnetic record. Li Long and his colleagues at the Hefei Institutes of Physical Science were looking…