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Hubble finds hints the Sombrero galaxy had a turbulent past

Thursday, February 27th 2020 03:26 PM

  New data from the Hubble Space Telescope reveals the popular Sombrero galaxy may have had a more violent past than previously thought. Based on the number of metal-rich stars Hubble spotted in the galaxy’s extended halo, astronomers think the seemingly serene Sombrero galaxy could have once went through a major merger with another galaxy.“The Sombrero has always been a bit of...

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Hubble captures a smeared fingerprint of an "anemic" galaxy

Wednesday, February 26th 2020 02:18 PM

  Looking at this face-on view of the galaxy NGC 4689, as seen by the Hubble Space Telescope, you can barely tell it's a spiral galaxy. Instead, thanks to its relatively dim spiral arms, NGC 4689 looks more like a smeared cosmic fingerprint — especially when compared to some of Hubble's other high-contrast hits.This mottled appearance is because NGC 4689 is an “anemic...

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The hottest known exoplanet is melting molecules in its atmosphere

Thursday, January 30th 2020 03:44 PM

  The hottest known exoplanet is back in the news, answering some questions about ultra-hot planets, while also raising some new ones. The planet, KELT-9b, was first announced in 2017. It’s roughly three times the mass of Jupiter, orbits its star every day and a half, and is a whopping 7,800 degrees Fahrenheit (4,300 Celsius). Just for the record, that’s hotter than some...

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Our new view of the Milky Way

Thursday, October 15th 2020 04:31 PM

  A lot can change in a year. First came the photo of an orange-and-black ring swirling in a distant galaxy. It splashed across newspapers worldwide last year, announcing the first-ever image of a black hole. Then, early this year, scientists released a data-based picture of our solar system floating at the edge of a towering wave of dazzling molecular clouds and stellar nurseries...

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Why astronomy is considered the oldest science

Thursday, October 8th 2020 01:35 PM

  Millions of years ago, ancient humans living on the African savanna likely gazed up in wonderment at the bright Moon and star-filled sky. This cosmic backdrop wasn't too different from the one we see today; but how they interacted with it almost assuredly was. It wasn’t until humans came to view the stars as tools that we became masters at understanding their movement...

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High-energy cosmic rays: Solving a century-old mystery

Thursday, October 1st 2020 03:07 PM

  “The Earth is being constantly bombarded from space by cosmic rays of an unknown origin!”    This may seem like the cry of a panicking news reporter in a lurid sci-fi tale, but it’s actually a scientific fact — albeit a slightly hyperbolic one.  Mysterious cosmic rays traveling at speeds approaching that of light constantly pelt Earth’s u...

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