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10 Jun 2020, 19:41 UTC A new set of precision distance measurements made with an international collection of radio telescopes have greatly increased the likelihood that theorists need to revise the “standard model” that describes the fundamental nature of the Universe.The new distance measurements allowed astronomers to refine their calculation of the Hubble Constant, the expansion rate of the Universe, a value important for testing the theoretical model describing the composition and evolution of the Universe. The problem is that the new measurements exacerbate a discrepancy between previously measured values of the Hubble Constant and the value predicted by the model when applied to measurements of the cosmic microwave background made by the Planck satellite.“We find that galaxies are nearer than predicted by the standard model of cosmology, corroborating a problem identified in other types of distance measurements. There has been debate over whether this problem lies in the model itself or in the measurements used to test it. Our work uses a distance measurement technique completely independent of all others, and we reinforce the disparity between measured and predicted values. It is likely that the basic cosmological model involved in the predictions is the problem,” said James Braatz, of the National Radio Astronomy Observatory ... Next Previous
ESA Top News 7 Aug 2020, 12:10 UTC Despite a nominal lifetime of two years, ESA’s Cluster is now entering its third decade in space. This unique four-spacecraft mission has been revealing the secrets of Earth’s magnetic environment since 2000 and, with 20 years of observations under its belt, is still enabling new discoveries as it explores our planet’s relationship with the Sun.
NASA's Goddard Space Flight Center 7 Aug 2020, 11:45 UTC The barred spiral galaxy known as NGC 4907 shows its starry face from 270 million light-years away to anyone who can see it from the Northern Hemisphere. This is a new image from the NASA/ESA Hubble Space Telescope of the face-on galaxy, displaying its beautiful spiral arms, wound loosely around its central bright bar of stars.
NASA's Goddard Space Flight Center 6 Aug 2020, 15:30 UTC Vast areas of the Martian night sky pulse in ultraviolet light, according to images from NASA’s MAVEN spacecraft. The results are being used to illuminate complex circulation patterns in the Martian atmosphere.
NASA's Goddard Space Flight Center 5 Aug 2020, 14:00 UTC Scientists have developed a new prediction of the shape of the bubble surrounding our solar system using a model developed with data from NASA missions.
ESA Top News 4 Aug 2020, 08:03 UTC In a peninsula far, far away, a laser shoots into the sky to study the Antarctic atmosphere at Concordia research station.
Harvard-Smithsonian Center for Astrophysics 3 Aug 2020, 15:05 UTC Scientists at the Center for Astrophysics | Harvard & Smithsonian (CfA) announced today the discovery of a complex set of spiral arms extending to 1000 astronomical units from the young variable star, RU Lup. The discovery, published in The Astrophysical Journal, reveals new details concerning the size and structure of "planet factories," the protoplanetary disks of gas and dust surrounding stars where planets are born.
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EarthSky Blog 7 Aug 2020, 12:18 UTC Thanks to orbiting spacecraft, we’ve now seen thousands of channels on Mars. They look like river channels, and most Mars researchers see them as evidence of a warmer, wetter Mars in the distant past. But, in early August 2020, Mars researchers announced that many of the channels weren’t carved by flowing river water at all. Instead, these scientists claim, the channels are due to the flow of meltwater beneath glacial ice sheets that crawled over Mars’ surface long ago.
New Scientist 6 Aug 2020, 19:00 UTC The outermost layer of the sun, called the corona, is extraordinarily difficult to study, but now researchers have made the first map of its magnetic field. This will help us predict solar flares that potentially threaten Earth.
Bad Astronomy 6 Aug 2020, 13:00 UTC For the first time, scientists have detected neutrinos coming from the Sun’s core that got their start via the CNO process, an until-now theorized type of stellar nuclear fusion. This is really cool, but it’ll take a bit of explaining.
Starts With a Bang! 5 Aug 2020, 14:01 UTC There are exposed planetary cores orbiting stars, and we may have already found them.