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E.g., 02/19/2018
E.g., 02/19/2018
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  • illustration of potential alien microbes
  • Enterprise nebulae
  • Venus
Your search has returned 2748 articles:
  • News

    Americans would welcome alien life rather than fear it

    AUSTIN, Texas — If alien microbes crash-land on Earth, they may get a warm welcome.

    When people were asked how they would react to the discovery of extraterrestrial microbial life, they give generally positive responses, researchers reported at a news conference February 16 at the annual meeting of the American Association for the Advancement of Science.

    This suggests that if...

    02/16/2018 - 17:00 Astrobiology, Microbiology, Science & Society
  • How To

    James Webb Space Telescope challenges artists to see in infrared

    With an astronomer’s toolkit and an artist’s eye, Zoltan Levay has transformed raw data from the Hubble Space Telescope into stunning space vistas for almost a quarter century (SN: 4/18/15, p. 4). He’s now preparing for a new challenge: Working with light not visible to human eyes.

    Levay’s next charge is the James Webb Space Telescope, set to launch in 2019. Unlike Hubble, which mostly...

    02/16/2018 - 12:58 Astronomy
  • News

    What will it take to go to Venus?

    There’s a planet just next door that could explain the origins of life in the universe. It was probably once covered in oceans (SN Online: 8/1/17). It may have been habitable for billions of years (SN Online: 8/26/16). Astronomers are desperate to land spacecraft there.

    No, not Mars. That tantalizing planet is Venus. But despite all its appeal, Venus is one of the hardest places in the...

    02/13/2018 - 07:00 Planetary Science, Exoplanets
  • Letters to the Editor

    Readers ask about supernovas, dark energy and more

    Dying light

    Supernova iPTF14hls has erupted continually since its discovery in 2014, fluctuating in brightness at least five times. It may have had two other outbursts in the past, Lisa Grossman reported in “This star cheated death, exploding again and again” (SN: 12/9/17, p. 8).

    Reddit user Bobgushmore wondered if the exploding star might actually be a supernova impostor similar to...

    02/07/2018 - 15:30 Astronomy, Physics, Science & Society
  • Science Ticker

    SpaceX just launched its biggest rocket for the first time

    It’s another record for SpaceX. At 3:50 p.m. Eastern on February 6, the private spaceflight company launched the Falcon Heavy rocket for the first time.

    The Heavy — essentially three SpaceX Falcon 9 rocket boosters strapped together — is the most powerful rocket launched since the Saturn V, which shot astronauts to the moon during the Apollo program. SpaceX hopes to use the Heavy to send...

    02/06/2018 - 16:09 Astronomy
  • News

    The way dwarf galaxies move puts a new spin on galaxy formation

    Small galaxies are playing a game of ring around the rosie. Dwarf galaxies have been caught following each other around the distant galaxy Centaurus A in a coordinated loop, rather than zipping around randomly as theory predicts they should.

    The discovery could spell trouble for standard theories of cosmology, including the role of enigmatic dark matter in galaxy formation, astronomers...

    02/05/2018 - 18:00 Cosmology
  • News

    Some of TRAPPIST-1’s planets could have life-friendly atmospheres

    It’s still too early to pack your bags for TRAPPIST-1. But two new studies probe the likely compositions of the seven Earth-sized worlds orbiting the cool, dim star, and some are looking better and better as places to live (SN: 3/18/17, p. 6).

    New mass measurements suggest that the septet probably have rocky surfaces and possibly thin atmospheres, researchers report February 5 in...

    02/05/2018 - 11:00 Astronomy, Exoplanets
  • News

    Universes with no weak force might still have stars and life

    Not all fundamental forces are created equal. An alternate universe that lacks the weak nuclear force — one of the four fundamental forces that govern all matter in our universe — could still form galaxies, stars, planets and perhaps life, according to calculations published online January 18 at arXiv.org.

    Scientists have long thought that our universe wouldn’t exist, or at least wouldn’...

    01/30/2018 - 07:00 Astronomy, Cosmology, Particle Physics
  • News

    Clumps of dark matter could be lurking undetected in our galaxy

    Clumps of dark matter may be sailing through the Milky Way and other galaxies.

    Typically thought to form featureless blobs surrounding entire galaxies, dark matter could also collapse into smaller clumps — similar to normal matter condensing into stars and planets — a new study proposes. Thousands of collapsed dark clumps could constitute 10 percent of the Milky Way’s dark matter,...

    01/26/2018 - 09:00 Particle Physics, Cosmology
  • Letters to the Editor

    Readers wonder about the universe's expansion and more

    Pedal to the universal metal

    Some cosmologists hope to explain the universe’s accelerating expansion by fully accounting for the universe’s lumpiness, Emily Conover reported in “Simulating the universe using Einstein’s theory of gravity may solve cosmic puzzles” (SN: 11/25/17, p. 22).

    The universe’s accelerating expansion “is apparently based on the observation of objects that are...

    01/24/2018 - 13:34 Cosmology, Archaeology, Astronomy