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E.g., 04/26/2019
E.g., 04/26/2019
Your search has returned 1283 images:
  • two-neutrino double electron capture
  • Mars InSight lander
  • Mercury
Your search has returned 3010 articles:
  • News

    This is the slowest radioactive decay ever spotted

    For the first time, researchers have directly observed an exotic type of radioactive decay called two-neutrino double electron capture.

    The decay, seen in xenon-124 atoms, happens so sparingly that it would take 18 sextillion years (18 followed by 21 zeros) for a sample of xenon-124 to shrink by half, making the decay extremely difficult to detect. The long-anticipated observation of two...

    04/24/2019 - 13:00 Particle Physics, Physics, Chemistry
  • News in Brief

    NASA’s Mars InSight lander may have the first recording of a Marsquake

    Let’s get ready to rumble: NASA may have just captured the first recording of an earthquake on Mars. On April 6, the Mars InSight lander’s seismometer recorded a short series of howls, grumbles and pings. One of those sounds — a grumble — is probably a Marsquake, representing the first recorded sound from the interior of the Red Planet, scientists say.

    The recording, released by NASA...

    04/23/2019 - 17:59 Planetary Science
  • News in Brief

    Mercury has a massive solid inner core

    The smallest planet in our solar system has a massive solid inner core.

    In its final trip around Mercury before crash-landing in 2015, NASA’s MESSENGER mission zoomed in close to the planet, enabling scientists to make detailed measurements of its gravity, spin and internal structure. Those data, researchers report April 10 in Geophysical Research Letters, suggest Mercury has a solid...

    04/22/2019 - 09:58 Planetary Science
  • News

    The M87 black hole image showed the best way to measure black hole masses

    The measure of a black hole is what it does with its stars.

    That’s one lesson astronomers are taking from the first-ever picture of a black hole, released on April 10 by an international telescope team (SN Online: 4/10/19). That image confirmed that the mass of the supermassive black hole in the center of galaxy M87 is close to what astronomers expected from how nearby stars orbit —...

    04/22/2019 - 06:00 Physics, Astronomy
  • News

    The first type of molecule to form in the universe has been seen in space

    Helium hydride ions, thought to be the first type of molecule to form in the universe, have finally been spotted in space.

    These charged molecules, each made of a neutral helium atom and a positively charged hydrogen atom, first emerged within about 100,000 years after the Big Bang. Back then, the universe was composed almost entirely of hydrogen and helium, and helium hydride was the...

    04/17/2019 - 13:00 Chemistry, Astronomy
  • News

    A 2014 meteor may have come from another solar system

    Earth may already have been visited by an object from outside our solar system — a meteor that burned up in the planet’s atmosphere in 2014, astronomers claim. If confirmed, it would be the first known interstellar object to have entered the atmosphere.

    The first interstellar visitor known to have come close to Earth was the roughly 400-meter-wide asteroid named ‘Oumuamua. It swooped...

    04/16/2019 - 14:29 Planetary Science
  • News

    Meteor showers dig up water on the moon

    Meteor showers bring moon geysers. A lunar orbiter spotted extra water around the moon when the moon passed through streams of cosmic dust that can cause meteor showers on Earth.

    The water was probably released from lunar soil by tiny meteorite impacts, planetary scientist Mehdi Benna of NASA Goddard Space Flight Center in Greenbelt, Md., and colleagues report April 15 in in Nature...

    04/15/2019 - 13:14 Planetary Science
  • News in Brief

    Saturn’s moon Titan sports phantom hydrocarbon lakes

    Three lakes on Saturn’s moon Titan have up and vanished.

    Researchers previously had seen evidence that Titan’s lakes, filled with hydrocarbons like methane and ethane, shrink during the moon’s summer. But a new analysis of data from the defunct Cassini spacecraft offers the first glimpse of lakes completely disappearing off the face of the moon. The discovery of these phantom lakes...

    04/15/2019 - 11:00 Planetary Science
  • Context

    Black hole image validates imagining the unimaginable

    Black holes capture everything they encounter. From subatomic particles to stars, solids, gases, liquids and even light, everything falls irretrievably in. And even more assuredly, black holes capture the popular imagination.Thinking about space, as humans have since they first gazed at the points of light decorating the nighttime sky, triggers the mind to imagine things that cannot be...

    04/12/2019 - 06:00 History of Science, Astronomy
  • News in Brief

    Israel’s first moon mission lost moments before landing

    Israel’s first lunar lander, Beresheet, appears to have crash-landed on the moon.

    The spacecraft, launched by the Israeli nonprofit SpaceIL, was scheduled to touch down on the lunar surface on April 11. But in the final few minutes of its descent, the spacecraft’s engine stalled. Mission control reset Beresheet to bring its engine back online, but then communication with the lander cut...

    04/11/2019 - 17:06 Planetary Science