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E.g., 11/22/2017
E.g., 11/22/2017
Your search has returned 994 images:
  • Cassini mosaic of Saturn
  • Arecibo observatory and radio telescope
  • HAWC experiment in Mexico
Your search has returned 2695 articles:
  • Science Ticker

    Here is Cassini’s last broad look at the Saturn system

    Two days before plunging into Saturn, the Cassini spacecraft took one last look around the planet it had orbited for more than 13 years.

    The view of Saturn above, released November 21, is actually made from 42 images that have been stitched together. Six moons — Enceladus, Epimetheus, Janus, Mimas, Pandora and Prometheus — are faintly visible as dots surrounding the gas giant (see the...

    11/22/2017 - 06:00 Astronomy, Planetary Science
  • Science Ticker

    The Arecibo Observatory will remain open, NSF says

    The iconic Arecibo Observatory has survived a hurricane and dodged deep budget cuts. On November 16, the National Science Foundation, which funds the bulk of the observatory’s operating costs, announced that they would continue funding the radio telescope at a reduced level.

    It’s not clear yet who will manage the observatory in the long run, or where the rest of the funding will come...

    11/17/2017 - 15:15 Astronomy
  • News

    Excess antielectrons aren’t from nearby dead stars, study says

    New observations of the whirling cores of dead stars have deepened the mystery behind a glut of antimatter particles raining down on Earth from space.

    The particles are antielectrons, also known as positrons, and could be a sign of dark matter — the exotic and unidentified culprit that makes up the bulk of the universe’s mass. But more mundane explanations are also plausible: Positrons...

    11/16/2017 - 14:19 Particle Physics
  • Science Ticker

    Colliding black holes are reported for a fifth time

    Spacetime ripples from black holes are becoming routine.

    For a fifth time, scientists have reported the detection of two colliding black holes via their gravitational waves, tiny vibrations that warp the fabric of spacetime. Unlike previous gravitational wave detections, which were heralded with news conferences often featuring panels of scientists squinting at journalists under bright...

    11/16/2017 - 11:40 Physics, Astronomy
  • Editor's Note

    In science, some big risks are worth the rewards

    At the end of my previous Editor’s Note (SN: 11/11/17, p. 2), I wrote about one of the great discoveries of the 1920s. By studying distant nebulae, Edwin Hubble found that our galaxy is not alone in the universe. Instead, it is one of an amazing multitude of “island universes.” When I wrote those words, I had no idea that just a couple of weeks later, I would get to visit the impressive...

    11/15/2017 - 13:18 Science & Society, History of Science, Astronomy
  • News

    Haze keeps Pluto cool by kicking heat out to space

    Blame Pluto’s haze for the dwarf planet’s unexpected chilliness. Clusters of hydrocarbons in the atmosphere radiate heat back into space, keeping the dwarf planet cool, a new study suggests. Pluto may be the only world in the solar system whose atmospheric temperature is controlled by solid particles, rather than gas, researchers report in the Nov. 16 Nature.

    Most planets’ temperatures...

    11/15/2017 - 13:00 Astronomy, Planetary Science
  • Feature

    Simulating the universe using Einstein’s theory of gravity may solve cosmic puzzles

    If the universe were a soup, it would be more of a chunky minestrone than a silky-smooth tomato bisque.

    Sprinkled with matter that clumps together due to the insatiable pull of gravity, the universe is a network of dense galaxy clusters and filaments — the hearty beans and vegetables of the cosmic stew. Meanwhile, relatively desolate pockets of the cosmos, known as voids, make up a thin...

    11/14/2017 - 15:30 Cosmology
  • Science Ticker

    New camera on Palomar telescope will seek out supernovas, asteroids and more

    A new eye on the variable sky just opened. The Zwicky Transient Facility, a robotic camera designed to rapidly scan the sky nightly for objects that move, flash or explode, took its first image on November 1.

    The camera, mounted on a telescope at Caltech’s Palomar Observatory near San Diego, succeeds the Palomar Transient Factory. Between 2009 and 2017, the Palomar Transient Factory...

    11/14/2017 - 12:00 Astronomy
  • The –est

    Ancient spiral galaxy is 11 billion years old

    Astronomers have spotted a spiral galaxy more ancient than any seen before.

    The galaxy, called A1689B11, emitted its light 11 billion years ago, just 2.6 billion years after the Big Bang. Researchers had previously reported a spiral galaxy that dates to 10.7 billion years ago.

     Astronomer Tiantian Yuan at Swinburne University of Technology in Melbourne, Australia and colleagues...

    11/14/2017 - 07:00 Astronomy
  • News

    This star cheated death, exploding again and again

    A shocking supernova refuses to die.

    This exploding star, named iPTF14hls, has erupted continuously for the last three years, and it may have had two other outbursts in the past, astronomers report in the Nov. 9 Nature. Such a tireless supernova could be the first example of a proposed explosion that involves burning antimatter in a stellar core — or it could be something new altogether...

    11/08/2017 - 13:00 Astronomy