10 Jun 2019, 13:00 UTC
Breakthrough Watch and the European Southern Observatory achieve “first light” on upgraded planet-finding instrument to search for Earth-like planets in nearest star systemNext Previous
5 Jun 2019, 17:00 UTC ** Summary: New ALMA observations reveal a never-before-seen disk of cool, interstellar gas wrapped around the supermassive black holeSupermassive Black HoleA black hole that has a million or as much as a billion solar masses. These large black holes lurk at the centers of most galaxies. at the center of the Milky Way. This nebulous disk gives astronomers new insights into the workings of accretion Accretion diskA disk of gas that accumulates around a center of gravitational attraction, such as a white dwarf, a neutron star, or a black hole. As the gas spirals in, it becomes hot and emits energy at a variety of wavelengths, including X-ray and radio waves. : the siphoning of material onto the surface of a black hole. The results are published in the journal Nature. **Through decades of study, astronomers have developed a clearer picture of the chaotic and crowded neighborhood surrounding the supermassive black hole at the center of the Milky Way. Our galactic center is approximately 26,000 light-years from Earth and the supermassive black hole there, known as Sagittarius A* (A “star”), is 4 million times the mass of our Sun.We now know that this region is brimming with roving stars, interstellar ... Next Previous
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ESA Top News 19 Jun 2019, 13:20 UTC ‘Comet Interceptor’ has been selected as ESA’s new fast-class mission in its Cosmic Vision Programme. Comprising three spacecraft, it will be the first to visit a truly pristine comet or other interstellar object that is only just starting its journey into the inner Solar System.
NASA's Chandra X-ray Observatory 18 Jun 2019, 18:20 UTC We have seen intricate patterns that milk makes in coffee and much smoother ones that honey makes when stirred with a spoon. Which of these cases best describes the behavior of the hot gas in galaxy clusters? By answering this question, a new study using NASA's Chandra X-ray Observatory has deepened our understanding of galaxy clusters, the largest structures in the Universe held together by gravity.
Planetary Habitability Laboratory 18 Jun 2019, 09:58 UTC Zechmeister et al. (2019) report as part of the CARMENES project the discovery of two potentially habitable planets around Teegarden's Star, an old nearby red dwarf star 12 light-years away in the Aries constellation. Both planets have minimum masses similar to Earth and orbit within the star's habitable zone.
Max Planck Institute for Astronomy
Two Earth-like planets around one of the smallest stars, and a slim chance someone there might see Earth18 Jun 2019, 02:00 UTC An international team of astronomers has found two Earth-like planets around one of the smallest known stars known as “Teegarden’s star.” The planets, which orbit in the star’s habitable zone where liquid water is possible, are only a quarter and a third more massive than the Earth, respectively. The discovery helps complete our picture of the statistics of exoplanet prevalence, correcting implicit biases in earlier observations. Incidentally, hypothetical observers on those planets would soon be in a uniquely favorable position to detect our Earth, using the so-called transit method. The results have just been published in the journal Astronomy & Astrophysics.
NASA's Goddard Space Flight Center 17 Jun 2019, 15:14 UTC The Sun is why we’re here. It’s also why Martians or Venusians are not.
NASA's Jet Propulsion Laboratory News and Features 14 Jun 2019, 15:09 UTC As NASA's Cassini dove close to Saturn in its final year, the spacecraft provided intricate detail on the workings of Saturn's complex rings, new analysis shows.
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Universe Today 18 Jun 2019, 23:00 UTC NASA’s OSIRIS-REx spacecraft has been at asteroid Bennu since Dec. 3rd, 2018. On that day, it went from travelling to the asteroid to travelling around it. Now OSIRIS-REx (Origins, Spectral Interpretation, Resource Identification, Security, Regolith Explorer) has reached a new milestone. On June 12th, the spacecraft executed another maneuver, and in the process broke its own record for the closest orbit of a planetary body by a spacecraft.
Universe Today 18 Jun 2019, 18:02 UTC On Earth, clouds form when enough droplets of water condense out of the air. And those droplets require a tiny speck of dust or sea salt, called a condensation nuclei, to form. In Earth’s atmosphere, those tiny specks of dust are lofted high into the atmosphere where they trigger cloud formation. But on Mars?
Starts With a Bang! 18 Jun 2019, 14:01 UTC One of the most profound rules in all the Universe is that nothing lasts forever. With gravitational, electromagnetic and nuclear forces all acting on matter, practically everything we observe to exist today will face changes in the future. Even the stars, the most enormous collections that transform nuclear fuel in the cosmos, will someday all burn out, including our Sun. But this does not mean that stellar death — when stars run out of nuclear fuel — is actually the end for a star like our Sun. Quite to the contrary, there are a number of fascinating things in store for all stars once they’ve died that first, most obvious death. Although it’s true that our Sun’s fuel is finite and we fully expect it to undergo a “typical” stellar death, this death is not the end. Not for our Sun, and not for any Sun-like stars. Here’s what comes next.
SpaceFlight Insider 18 Jun 2019, 04:01 UTC Prospects of establishing a permanent human presence on the Moon have taken a step forward with the test of a system known as Kilopower, a lightweight fission reactor which could provide ten kilowatts of power for at least a decade.
Universe Today 17 Jun 2019, 20:18 UTC To say there are some myths circulating about Martian dust storms would be an understatement. Mars is known for its globe-encircling dust storms, the likes of which are seen nowhere else. Science fiction writers and Hollywood movies often make the dust storms out to be more dangerous than they really are. In reality—though global dust storms are a true spectacle, and winds can reach speeds of nearly 100 kph (60mph)—they’re not violent.