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Nine sources of extremely high-energy gamma rays comprise a new catalog compiled by researchers. All produce gamma rays with energies over 56 trillion electron volts (TeV) and three emit gamma rays extending to 100 TeV and beyond, making these the highest-energy sources ever observed in our galaxy.
Jan 14th, 2020
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A 'cold Neptune' and two potentially habitable worlds are part of a cache of five newly discovered exoplanets and eight exoplanet candidates found orbiting nearby red dwarf stars.
Jan 14th, 2020
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A single bright star in the constellation of Indus, visible from the southern hemisphere, has revealed new insights on an ancient collision that our galaxy the Milky Way underwent with another smaller galaxy called Gaia-Enceladus early in its history.
Jan 14th, 2020
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A new study has found that collisions of supermassive black holes may be simultaneously observable in both gravitational waves and X-rays at the beginning of the next decade.
Jan 14th, 2020
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Gamma-ray bursts are the Universe's brightest explosions, caused by massive collapsing stars. Stars need to be in binary systems to create gamma-ray bursts.
Jan 13th, 2020
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The theory that dark matter could be made of primordial black holes a fraction of a millimetre in size has been ruled out by a team of researchers.
Jan 9th, 2020
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Astronomers have cataloged signs of 9 heavy metals in the infrared light from supergiant and giant stars.
Jan 9th, 2020
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Using NASA's Hubble Space Telescope and a new observing technique, astronomers have found that dark matter forms much smaller clumps than previously known. This result confirms one of the fundamental predictions of the widely accepted 'cold dark matter' theory.
Jan 8th, 2020
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The TOI 1338 system lies 1,300 light-years away in the constellation Pictor. The two stars orbit each other every 15 days. One is about 10% more massive than our Sun, while the other is cooler, dimmer and only one-third the Sun's mass.
Jan 7th, 2020
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NASA's Transiting Exoplanet Survey Satellite (TESS) has discovered its first Earth-size planet in its star's habitable zone, the range of distances where conditions may be just right to allow the presence of liquid water on the surface.
Jan 7th, 2020
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Astronomers have pinpointed the origin of a repeating Fast Radio Burst to a nearby spiral galaxy, challenging theories on the unknown source of these pulses.
Jan 6th, 2020
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Astronomers seeking to learn about the mechanisms that formed massive black holes in the early history of the Universe have gained important new clues with the discovery of 13 such black holes in dwarf galaxies less than a billion light-years from Earth.
Jan 6th, 2020
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Astronomers found a young star surrounded by an astonishing mass of gas. The star, called 49 Ceti, is 40 million years old and conventional theories of planet formation predict that the gas should have disappeared by that age.
Dec 23rd, 2019
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NASA's Fermi Gamma-ray Space Telescope has discovered a faint but sprawling glow of high-energy light around a nearby pulsar. If visible to the human eye, this gamma-ray 'halo' would appear about 40 times bigger in the sky than a full Moon. This structure may provide the solution to a long-standing mystery about the amount of antimatter in our neighborhood.
Dec 20th, 2019
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Deep in our Milky Way galaxy's center, a candy cane emerges as the centerpiece of a new, colorful composite image from a NASA camera, just in time for the holidays.
Dec 19th, 2019
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Astronomers have investigated galactic radio objects that adopt shapes such as Christmas trees and harps. They were able to answer the old question of the transport of cosmic rays.
Dec 19th, 2019
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