Stars – Science

Stars News -- ScienceDaily News about Stars. Read science articles and see images on the birth of monstrous stars, brown dwarfs and red giants. Consider stellar evolution and more.

  • Astrophysicist predicts detached, eclipsing white dwarfs to merge into exotic star
    on August 18, 2017 at 8:24 pm

    Astrophysicists have discovered two detached, eclipsing double white dwarf binaries with orbital periods of 40 and 46 minutes, respectively. White dwarfs are the remnants of Sun-like stars, many of which are found in pairs, or binaries. […]

  • An unusual white dwarf may be a supernova leftover
    on August 17, 2017 at 6:17 pm

    Astronomers have identified a white dwarf star in our galaxy that may be the leftover remains of a recently discovered type of supernova. […]

  • Astrophysicists predict Earth-like planet in star system only 16 light years away
    on August 17, 2017 at 3:08 pm

    Astrophysicists have predicted that an Earth-like planet may be lurking in a star system just 16 light years away. The team investigated the star system Gliese 832 for additional exoplanets residing between the two currently known alien worlds in this system. Their computations revealed that an additional Earth-like planet with a dynamically stable configuration may be residing at a distance ranging from 0.25 to 2.0 astronomical unit (AU) from the star. […]

  • Four Earth-sized planets detected orbiting the nearest sun-like star
    on August 17, 2017 at 1:55 pm

    Astronomers have discovered four Earth-sized planets orbiting the nearest sun-like star, tau Ceti, which is about 12 light years away and visible to the naked eye. These planets have masses as low as 1.7 Earth mass, making them among the smallest planets ever detected around nearby sun-like stars. Two of them are super-Earths located in the habitable zone of the star, meaning they could support liquid surface water. […]

  • Supernova collides with nearby star, taking astrophysicists by surprise
    on August 14, 2017 at 5:48 pm

    In the 2009 film 'Star Trek,' a supernova hurtles through space and obliterates a planet unfortunate enough to be in its path. Fiction, of course, but it turns out the notion is not so farfetched. […]

  • New observations of Crab Nebula and Pulsar reveal polarized emissions
    on August 10, 2017 at 12:21 pm

    New observations of polarised X-rays from the Crab Nebula and Pulsar may help explain sudden flares in the Crab’s X-ray intensity, as well as provide new data for modeling – and understanding – the nebula. […]

  • The mystery of the pulsating blue stars
    on August 9, 2017 at 6:02 pm

    In the middle of the Chilean Atacama desert, a team of astronomers are monitoring millions of celestial bodies. In 2013, the team was surprised when they discovered, in the course of their survey, stars that pulsated much faster than expected. In the following years, the team studied these stars in more detail and concluded that they had stumbled upon a new class of variable star. […]

  • Black holes pervade the universe, celestial census indicates
    on August 7, 2017 at 7:54 pm

    After conducting a cosmic inventory of sorts to calculate and categorize stellar-remnant black holes, astronomers have concluded that there are probably tens of millions of the enigmatic, dark objects in the Milky Way -- far more than expected. […]

  • Primordial black holes may have helped to forge heavy elements
    on August 4, 2017 at 5:18 pm

    Astronomers like to say we are the byproducts of stars, stellar furnaces that long ago fused hydrogen and helium into the elements needed for life through the process of stellar nucleosynthesis. But what about the heavier elements in the periodic chart, elements such as gold, platinum and uranium? Astronomers believe most of these "r-process elements" -- elements much heavier than iron -- were created, either in the aftermath of the collapse of massive stars and the associated supernova explosions, or in the merging of binary neutron star systems. […]

  • Our solar system's 'shocking' origin story
    on August 3, 2017 at 2:31 pm

    According to one longstanding theory, our Solar System's formation was triggered by a shock wave from an exploding supernova. It injected material from the exploding star into a neighboring cloud of dust and gas, causing it to collapse in on itself and form the Sun and its surrounding planets. New work offers fresh evidence supporting this theory, modeling the Solar System's formation beyond the initial cloud collapse and into the intermediate stages of star formation. […]

  • Solving the mystery of the sun's hot atmosphere
    on August 3, 2017 at 1:19 pm

    The elemental composition of the Sun's hot atmosphere known as the 'corona' is strongly linked to the 11-year solar magnetic activity cycle, a team of scientists has revealed for the first time. […]

  • New simulations could help in hunt for massive mergers of neutron stars, black holes
    on August 2, 2017 at 5:47 pm

    Scientists have developed new computer models to explore what happens when a black hole joins with a neutron star - the superdense remnant of an exploded star. […]

  • Running out of gas: Gas loss puts breaks on stellar baby boom
    on August 2, 2017 at 12:33 pm

    Understanding the history of star formation in the Universe is a central theme in modern astronomy. Various observations have shown that the star formation activity has varied through the 13.8 billion-year history of the Universe. The stellar birthrate peaked around 10 billion years ago, and has declined steadily since then. However, the cause of the declining stellar birthrate is still not well understood. […]

  • Earth-like atmosphere may not survive Proxima b's orbit
    on July 31, 2017 at 8:41 pm

    An Earth-like planet outside the solar system may not be able to keep a grip on its atmosphere, leaving the surface exposed to harmful stellar radiation and reducing its potential for habitability. […]

  • Astronomers discover 'heavy metal' supernova rocking out
    on July 31, 2017 at 3:45 pm

    An extraordinarily bright supernova occurred in a surprising location, astronomers have found. This 'heavy metal' supernova discovery challenges current ideas of how and where such super-charged supernovas occur. In the past decade, astronomers have discovered about 50 supernovas, out of the thousands known, that are particularly powerful. Following the recent discovery of one of these, the researchers have uncovered vital clues about where some of these extraordinary objects come from. […]

  • Quasars may answer how starburst galaxies were extinguished
    on July 31, 2017 at 1:54 pm

    Astronomers have located quasars inside four dusty starburst galaxies. The observations suggest quasars may starve this type of galaxy of energy needed to form stars. […]

  • Glittering stars: Spiral galaxy NGC 4248
    on July 28, 2017 at 5:36 pm

    This beautiful clump of glowing gas, dark dust and glittering stars is the spiral galaxy NGC 4248, located about 24 million light-years away in the constellation of Canes Venatici (The Hunting Dogs). […]

  • Galactic David and Goliath
    on July 27, 2017 at 2:30 pm

    The gravitational dance between two galaxies in our local neighbourhood has led to intriguing visual features in both as witnessed in this new NASA/ESA Hubble Space Telescope image. The tiny NGC 1510 and its colossal neighbour NGC 1512 are at the beginning of a lengthy merger, a crucial process in galaxy evolution. Despite its diminutive size, NGC 1510 has had a significant effect on NGC 1512's structure and amount of star formation. […]

  • A tale of three stellar cities: Three different populations of baby stars
    on July 27, 2017 at 12:31 pm

    Using new observations from ESO's VLT Survey Telescope, astronomers have discovered three different populations of baby stars within the Orion Nebula Cluster. This unexpected discovery adds very valuable new insights for the understanding of how such clusters form. It suggests that star formation might proceeds in bursts, where each burst occurs on a much faster time-scale than previously thought. […]

  • Superluminous supernova marks the death of a star at cosmic high noon
    on July 21, 2017 at 4:25 pm

    The death of a massive star in a distant galaxy 10 billion years ago created a rare superluminous supernova, one of the most distant ever discovered. The brilliant explosion, more than three times as bright as the 100 billion stars of our Milky Way galaxy combined, occurred about 3.5 billion years after the big bang at a period known as 'cosmic high noon,' when the rate of star formation in the universe reached its peak. […]

  • Best measure of star-forming material in galaxy clusters in early universe
    on July 20, 2017 at 5:31 pm

    The international Spitzer Adaptation of the Red-sequence Cluster Survey (SpARCS) collaboration has combined observations from several of the world's most powerful telescopes to carry out one of the largest studies yet of molecular gas -- the raw material which fuels star formation throughout the universe -- in three of the most distant clusters of galaxies ever found, detected as they appeared when the universe was only four billion years old. […]

  • NASA Neutron star mission begins science operations
    on July 18, 2017 at 1:15 pm

    The Neutron star Interior Composition Explorer, or NICER, payload completed commissioning and calibration and all systems are working as expected. […]

  • New hot Jupiter marks the first collaborative exoplanet discovery
    on July 18, 2017 at 12:52 pm

    Researchers have discovered a new 'Hot Jupiter' exoplanet. […]

  • New brown dwarf discovered by citizen science project
    on July 17, 2017 at 7:09 pm

    One night three months ago, Rosa Castro finished her dinner, opened her laptop, and uncovered a novel object that was neither planet nor star. Therapist by day and amateur astronomer by night, Castro joined the NASA-funded Backyard Worlds: Planet 9 citizen science project when it began in February -- not knowing she would become one of four volunteers to help identify the project's first brown dwarf, formally known as WISEA J110125.95+540052.8. […]

  • Hubble spots a barred Lynx spiral
    on July 14, 2017 at 10:31 pm

    Discovered by British astronomer William Herschel over 200 years ago, NGC 2500 lies about 30 million light-years away in the northern constellation of Lynx. NGC 2500 is a particular kind of spiral galaxy known as a barred spiral, its wispy arms swirling out from a bright, elongated core.&nbs […]

  • One of the brightest galaxies ever discovered
    on July 14, 2017 at 6:03 pm

    Thanks to an amplified image produced by a gravitational lens, and the Gran Telescopio CANARIAS, a team of scientists has discovered one of the brightest galaxies known from the epoch when the universe had 20 percent of its present age. […]

  • Complex gas motion in the centre of the Milky Way
    on July 13, 2017 at 8:54 pm

    Our solar system is located in the outer regions of the Milky Way, a disk-shaped galaxy with an approximate diameter of 100,000 light years. From Earth, its appearance can only be observed indirectly, by measuring positions and movements of stars and gas clouds. In addition to luminous stars, a substantial portion of the visible matter in our Milky Way is interstellar gas. Gas clouds in the so-called central molecular zone (CMZ) -- the innermost 1,500 light years of the Milky Way -- move on an elliptical central disk that has two spiral arms. A comprehensive model has now been used to simulate this motion. […]

  • Yes, the sun is an ordinary, solar-type star after all
    on July 13, 2017 at 7:50 pm

    The Sun is a solar-type star, a new study claims -- resolving an ongoing controversy about whether the star at the center of our Solar System exhibits the same cyclic behavior as other nearby, solar-type stars. […]

  • Shedding light on Galaxies' rotation secrets
    on July 13, 2017 at 7:48 pm

    Spiral galaxies are found to be strongly rotating, with an angular momentum higher by a factor of about 5 than ellipticals. In a new study, the researchers have traced back the dichotomy in the angular momentum of spiral and elliptical galaxies to their different formation history. In particular, the low angular momentum of ellipticals is mainly originated by nature in the central regions during the early galaxy formation process. […]

  • Unusual galaxy in distant universe
    on July 12, 2017 at 11:46 am

    MACS2129-1 is dead in the sense that it no longer produces stars. But what makes this galaxy particularly significant is the fact that, unlike many dead galaxies, which tend to be elliptical or oval-shaped, this galaxy is disk or spiral-shaped, like the Milky Way, and its stars rotate in a flattened disk, much like the Milky Way's stars. […]