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Science Release: Latest Hubble Measurements Suggest Disparity in Hubble Constant Calculations is not a FlukeNext Previous
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2 Apr 2019, 17:19 UTC Astronomers used the National Science Foundation’s Karl G. Jansky Very Large Array (VLA) to make the first direct image of a dusty, doughnut-shaped feature surrounding the supermassive black hole at the core of one of the most powerful radio galaxies in the Universe — a feature first postulated by theorists nearly four decades ago as an essential part of such objects.The scientists studied Cygnus A, a galaxy some 760 million light-years from Earth. The galaxy harbors a black hole at its core that is 2.5 billion times more massive then the Sun. As the black hole’s powerful gravitational pull draws in surrounding material, it also propels superfast jets of material traveling outward at nearly the speed of light, producing spectacular “lobes” of bright radio emission.Black hole-powered “central engines” producing bright emission at various wavelengths, and jets extending far beyond the galaxy are common to many galaxies, but show different properties when observed. Those differences led to a variety of names, such as quasars, blazars, or Seyfert galaxies. To explain the differences, theorists constructed a “unified model” with a common set of features that would show different properties depending on the angle from which they are viewed.The unified model includes the ... Next Previous
NASA's Goddard Space Flight Center 24 May 2019, 11:55 UTC This Hubble image stars Messier 90, a beautiful spiral galaxy located roughly 60 million light-years from the Milky Way in the constellation of Virgo (the Virgin). The galaxy is part of the Virgo Cluster, a gathering of galaxies that is over 1,200 strong.
ESO Top News 23 May 2019, 15:00 UTC ATTRACT, a Horizon 2020 research and innovation project funded by the European Union and backed by a consortium of 9 partners including ESO, has announced 170 breakthrough ideas which will each receive €100,000 to develop technologies that have the potential to change society. The selected proposals include projects which highlight the societal benefits of ESO's astronomical expertise.
NASA's Ames Research Center News and Features 23 May 2019, 15:00 UTC The mystery of why Earth has so much water, allowing our “blue marble” to support an astounding array of life, is clearer with new research into comets. Comets are like snowballs of rock, dust, ice, and other frozen chemicals that vaporize as they get closer to the Sun, producing the tails seen in images. A new study reveals that the water in many comets may share a common origin with Earth’s oceans, reinforcing the idea that comets played a key role in bringing water to our planet billions of years ago.
ESA Top News 22 May 2019, 08:00 UTC ESA’s Large Diameter Centrifuge at the Agency’s technical heart in the Netherlands is seen running here at full speed. The 8-m diameter four-arm centrifuge gives researchers access to a range of hypergravity environments up to 20 times Earth’s gravity for weeks or months at a time.
NASA's Jet Propulsion Laboratory News and Features 20 May 2019, 16:02 UTC NASA's Juno mission to Jupiter made the first definitive detection beyond our world of an internal magnetic field that changes over time, a phenomenon called secular variation. Juno determined the gas giant's secular variation is most likely driven by the planet's deep atmospheric winds.
ESA Top News 20 May 2019, 14:45 UTC Black holes are among the most fascinating objects in the Universe. Enclosing huge amounts of matter in relatively small regions, these compact objects have enormous densities that give rise to some of the strongest gravitational fields in the cosmos, so strong that nothing can escape – not even light.
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NASA Space Station Blog 24 May 2019, 15:21 UTC The Expedition 59 crew is starting the Memorial Day weekend studying biology, physics and orbital manufacturing techniques. The space residents will also be busy on the U.S. holiday conducting more research and getting ready for the year’s fourth spacewalk at the International Space Station on Wednesday.
Bad Astronomy 24 May 2019, 13:00 UTC Let's start 650 light years way, in the direction of the constellation Aquarius. There's a star there that is decidedly odd. Called R Aquarii*, it's the swollen hulk of a star that was once much like the Sun, but is now nearing the end of its life. Complicated processes in the core have dumped huge amounts of energy into the outer layers of the star, and when you heat up a gas it expands. But, it gets so big that the amount of energy it emits per square centimeter actually goes down, so its temperature drops as well. Cooler stars emit redder light, so we call these stars red giants.
SciTech Daily 24 May 2019, 02:50 UTC Ashfall from ancient volcanic explosions is the likely source of a strange mineral deposit near the landing site for NASA’s next Mars rover, a new study finds. The research, published in the journal Geology, could help scientists assemble a timeline of volcanic activity and environmental conditions on early Mars.
Vintage Space 23 May 2019, 17:00 UTC In the final minutes of Apollo 11’s descent to the lunar surface, five 1201 and 1202 alarms blared in the lunar module. The computer was overloaded with data, and for a brief moment it looked like Neil Armstrong and Buzz Aldrin wouldn’t land on the Moon. As we know, they did; Apollo 11 got a GO to land in spite of the alarms. What we don’t know is the man whose work allowed the crew reboot the computer and save the landing: Hal Laning.