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Articles sur Space

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Artists impression of what WASP-17b could look like, based on. data gathered by Mid-Infrared Instrument (MIRI) and other ground- and space-based telescopes, including the Hubble and Spitzer space telescopes. NASA, ESA, CSA, Ralf Crawford (STScI)

Clouds of quartz detected high in a distant planet’s atmosphere – here’s what this tells us about other worlds

The atmosphere is a reflection of extreme conditions on the super-heated planet.
Astronomers can estimate ages for stars outside the Solar System, but not planets. Corbis Historical via Getty Images

How do astronomers know the age of the planets and stars?

Measuring the ages of planets and stars is tricky. An observational astrophysicist describes the subtle clues that provide good estimates for how old different space objects are.
As new and powerful telescopes gather new data about the universe, they reveal the limits of older theories. (Shutterstock)

Why Einstein must be wrong: In search of the theory of gravity

Einstein’s theory of general relativity suggests that our universe originated in a Big Bang. But black holes, and their gravitational forces, challenge the limits of Einstein’s work.
NASA’s UAP study team and newly appointed director of UAP research represent growing efforts to study and declassify UFO-related data. AP Photo/Terry Renn

NASA report finds no evidence that UFOs are extraterrestrial

Months after a military officer made sensational claims about unexplained objects in the skies, NASA released a report loosely outlining a scientific approach for analyzing UAP reports.

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