Sun

Sun News -- ScienceDaily News about the Sun. Science articles on Sunspots and the Sun's Corona; evidence the Sun has a companion star; images from the far side of the Sun and more.

  • Challenging existing models of black holes
    on January 19, 2018 at 1:59 pm

    A new study expands the scientific community's understanding of black holes in our galaxy and the magnetic fields that surround them. […]

  • Meteoritic stardust unlocks timing of supernova dust formation
    on January 18, 2018 at 7:26 pm

    Dust is everywhere -- not just in your attic or under your bed, but also in outer space. To astronomers, dust can be a tool to study the history of our universe, galaxy, and Solar System. For example, observations indicate that type II supernovae -- explosions of stars more than ten times as massive as the Sun -- produce copious amounts of dust, but how and when they do so is not well understood. […]

  • Middle-aged sun observed by tracking motion of Mercury
    on January 18, 2018 at 7:18 pm

    Like the waistband of a couch potato in midlife, the orbits of planets in our solar system are expanding. It happens because the Sun's gravitational grip gradually weakens as our star ages and loses mass. Now, scientists have indirectly measured this mass loss and other solar parameters by looking at changes in Mercury's orbit. […]

  • How massive can neutron stars be?
    on January 16, 2018 at 2:36 pm

    Astrophysicists set a new limit for the maximum mass of neutron stars: It cannot exceed 2.16 solar masses. […]

  • Astronomers to build space telescope to explore nearby stars
    on January 11, 2018 at 3:05 am

    A new mission will launch a small satellite telescope into space to study the environment in other solar systems around the Galaxy's most common type of star. […]

  • Extra-terrestrial Hypatia stone rattles solar system status quo
    on January 9, 2018 at 4:24 pm

    Analyses on a small pebble found in south-west Egypt cast significant questions on a widely-held view about the primitive pre-solar dust cloud which our Sun, Earth and other planets were formed from. Researchers found exotic micro-mineral compounds in the 'Hypatia' stone that are not known to occur on Earth, elsewhere in our solar system, or in known meteorites or comets. […]

  • Special star is a Rosetta Stone for understanding the sun's variability and climate effect
    on January 5, 2018 at 5:40 pm

    Scientists have found a star that can help shed light on the physics underlying the solar dynamo. Researchers combined observations from the Kepler spacecraft with ground-based observations as far back as 1978, thereby reconstructing a 7.4-year cycle in this star. The star is almost identical to the Sun, except for the chemical composition. That makes it a Rosetta Stone for the study of stellar dynamos. […]

  • Weighing massive stars in nearby galaxy reveals excess of heavyweights
    on January 4, 2018 at 8:31 pm

    Astronomers have revealed an 'astonishing' overabundance of massive stars in a neighboring galaxy. The discovery, made in the gigantic star-forming region 30 Doradus in the Large Magellanic Cloud galaxy, has 'far-reaching' consequences for our understanding of how stars transformed the pristine Universe into the one we live in today. […]

  • NASA's Magnetospheric Multiscale Mission locates elusive electron act
    on January 3, 2018 at 9:01 pm

    New research helps improve our understanding of how electrons move through the complex region around Earth -- information that will help untangle how such particle acrobatics affect the planet. […]

  • Scientists describe how solar system could have formed in bubble around giant star
    on December 23, 2017 at 6:48 pm

    Scientists have laid out a comprehensive theory for how our solar system could have formed in the wind-blown bubbles around a giant, long-dead star. The study addresses a nagging cosmic mystery about the abundance of two elements in our solar system compared to the rest of the galaxy. […]

  • Star in the constellation Pisces is 'eating' planets
    on December 21, 2017 at 9:07 pm

    Astronomers have discovered that a distant star called RZ Picseum in the constellation Pisces is crushing one or more planets into its orbit into a vast cloud of gas and dust. […]

  • Giant bubbles on red giant star's surface
    on December 20, 2017 at 6:17 pm

    Astronomershave for the first time directly observed granulation patterns on the surface of a star outside the Solar System -- the ageing red giant ?1 Gruis. This remarkable new image reveals the convective cells that make up the surface of this huge star, which has 350 times the diameter of the Sun. Each cell covers more than a quarter of the star's diameter and measures about 120 million kilometers across. […]

  • The Halloween asteroid prepares to return in 2018
    on December 20, 2017 at 3:05 am

    There is one year to go until asteroid 2015 TB-145 approaches Earth once again, just as it did in 2015 around the night of Halloween, an occasion which astronomers did not pass up to study its characteristics. This dark object measures between 625 and 700 meters, its rotation period is around three hours and, in certain lighting conditions, it resembles a human skull. […]

  • NASA solves how a Jupiter jet stream shifts into reverse
    on December 19, 2017 at 2:13 pm

    Speeding through the atmosphere high above Jupiter's equator is an east-west jet stream that reverses course on a schedule almost as predictable as a Tokyo train's. Now, a research team has identified which type of wave forces this jet to change direction. […]

  • The missing link between exploding stars, clouds, and climate on Earth
    on December 19, 2017 at 2:13 pm

    The study reveals how atmospheric ions, produced by the energetic cosmic rays raining down through the atmosphere, helps the growth and formation of cloud condensation nuclei -- the seeds necessary for forming clouds in the atmosphere. […]

  • Orbital mayhem around a red dwarf
    on December 18, 2017 at 5:03 pm

    In the collective imagination, planets of a solar system all circle around their star, in the equatorial plane of the star. The star also spins, and its spin axis is aligned with the spin axes of the planetary orbits, giving the impression of a well-ordered system. But nature is capricious, as astronomers just found out: they detected a planetary system turned upside down. […]

  • Alien object 'Oumuama was a natural body visiting from another solar system
    on December 18, 2017 at 5:01 pm

    Scientists have investigated a mysterious object that passed close to Earth after arriving from deep interstellar space. […]

  • Six-decade-old space mystery solved with shoebox-sized satellite called a CubeSat
    on December 14, 2017 at 9:32 pm

    A 60-year-old mystery about the source of energetic, potentially damaging particles in Earth's radiation belts has been solved using data from a shoebox-sized satellite built and operated by students. The satellite is called a CubeSat. […]

  • Artificial intelligence, NASA data used to discover eighth planet circling distant star
    on December 14, 2017 at 7:14 pm

    Our solar system now is tied for most number of planets around a single star, with the recent discovery of an eighth planet circling Kepler-90, a Sun-like star 2,545 light years from Earth. The planet was discovered in data from NASA's Kepler Space Telescope. […]

  • Spanning disciplines in the search for life beyond Earth
    on December 13, 2017 at 5:47 pm

    Following a gold rush of exoplanet discovery, the next step in the search for life is determining which of the known exoplanets are proper candidates for life -- and for this, a cross-disciplinary approach is essential. […]

  • Mars mission sheds light on habitability of distant planets
    on December 13, 2017 at 5:47 pm

    Insights from NASA's Mars Atmosphere and Volatile Evolution, or MAVEN, mission about the loss of the Red Planet's atmosphere can help scientists understand the habitability of rocky planets orbiting other stars. […]

  • Does eclipse equal night in plant life?
    on December 13, 2017 at 2:55 pm

    As the Aug. 21 eclipse approached, researchers prepared to understand plants' response to light and temperature. The varied results have left the researchers with interesting questions. […]

  • Electrical and chemical coupling between Saturn and its rings
    on December 12, 2017 at 7:17 pm

    A Langmuir probe, flown to Saturn on the Cassini spacecraft, has made exciting discoveries in the atmosphere of the planet. They discovered that there is a strong coupling, both chemically and electrically, between the atmosphere of Saturn and its rings. […]

  • Life's building blocks observed in spacelike environment
    on December 12, 2017 at 5:54 pm

    Where do the molecules required for life originate? It may be that small organic molecules first appeared on earth and were later combined into larger molecules, such as proteins and carbohydrates. But a second possibility is that they originated in space, possibly within our solar system. A new study shows that a number of small organic molecules can form in a cold, spacelike environment full of radiation. […]

  • Eclipse 2017: Science from the moon's shadow
    on December 11, 2017 at 7:04 pm

    While people across North America took in the Aug. 21 eclipse, hundreds of citizen, student, and professional scientists were collecting scientific data, and their efforts are beginning to return results. […]

  • Galaxy growth in a massive halo in the first billion years of cosmic history
    on December 7, 2017 at 7:07 pm

    Observations of two galaxies made with the National Science Foundation-funded Atacama Large Millimeter/submillimeter Array (ALMA) radio telescope suggest that large galaxies formed faster than scientists had previously thought. […]

  • Mars' atmosphere well protected from the solar wind
    on December 7, 2017 at 7:05 pm

    Despite the absence of a global Earth-like magnetic dipole, the Martian atmosphere is well protected from the effects of the solar wind on ion escape from the planet. New research shows this using measurements from the Swedish particle instrument ASPERA-3 on the Mars Express spacecraft. […]

  • NASA's SuperTIGER balloon flies again to study heavy cosmic particles
    on December 6, 2017 at 9:22 pm

    A science team in Antarctica is preparing to fly SuperTIGER, a balloon-borne instrument designed to collect heavy high-energy particles from beyond the solar system that constantly bombard Earth's atmosphere. […]

  • ALMA finds massive primordial galaxies swimming in vast ocean of dark matter
    on December 6, 2017 at 6:20 pm

    New observations push back the epoch of massive-galaxy formation even further by identifying two giant galaxies seen when the universe was only 780 million years old, or about 5 percent its current age. […]

  • Scientists observe supermassive black hole in infant universe
    on December 6, 2017 at 6:19 pm

    A team of astronomers has detected the most distant supermassive black hole ever observed. The black hole sits in the center of an ultrabright quasar and presents a puzzle as to how such a huge object could have grown so quickly. […]