NASA's Goddard Space Flight Center
Observatories Assemble: NASA’s Juno Spacecraft Joins Japan’s Hisaki Satellite and W. M. Keck Observatory to Solve “Energy Crisis” on Jupiter4 Aug 2021, 15:00 UTC Sitting more than five times the distance from the Sun as Earth, Jupiter is not expected to be particularly warm. Based on the amount of sunlight received, the average temperature in the planet’s upper atmosphere should be about minus 100 degrees Fahrenheit or a chilly minus 73 Celsius. Instead, the measured value soars to around 800 degrees Fahrenheit or 426 Celsius. The source of this extra heat has remained elusive for 50 years, causing scientists to refer to the discrepancy as an “energy crisis” for the planet.
NASA's Goddard Space Flight Center 3 Aug 2021, 15:00 UTC Shortly after it formed, the Moon was covered in a global ocean of molten rock (magma). As the magma ocean cooled and solidified, dense minerals sank to form the mantle layer, while less-dense minerals floated to form the surface crust. Later intense bombardment by massive asteroids and comets punched through the crust, blasting out pieces of mantle and scattering them across the lunar surface.
NASA's Goddard Space Flight Center 3 Aug 2021, 14:00 UTC New research led by NASA provides a closer look at a nearby star thought to resemble our young Sun. The work allows scientists to better understand what our Sun may have been like when it was young, and how it may have shaped the atmosphere of our planet and the development of life on Earth.
American Astronomical Society 30 Jul 2021, 20:16 UTC A study led by the Instituto de Astrofísica de Canarias has discovered long narrow dust filaments which surround and feed black holes in the centres of galaxies, and which could be the natural cause of the darkening of the centres of many galaxies when their nuclear black holes are active.
American Astronomical Society 29 Jul 2021, 16:06 UTC W. M. Keck Observatory Planet Imager and Characterizer Instrument Delivers First Science, Capturing Spin Measurements of HR 8799 Exoplanets
American Astronomical Society 29 Jul 2021, 14:30 UTC ALMA data proves that ram pressure stripping doesn’t spell an immediate end for galaxies.
NASA's Jet Propulsion Laboratory News and Features 29 Jul 2021, 14:00 UTC Three studies published in the past month have cast doubt on the premise of subsurface lakes below the Martian south pole.
American Astronomical Society 28 Jul 2021, 01:10 UTC An international team of astrophysicists has discovered the presence of transverse rotation in three dwarf spheroidal galaxies, a very faint type of galaxies and difficult to observe, which are orbiting round the Milky Way; this helps to trace their evolutionary history.
NASA's Goddard Space Flight Center 26 Jul 2021, 15:00 UTC For the first time, astronomers have uncovered evidence of water vapor in the atmosphere of Jupiter's moon Ganymede. This water vapor forms when ice from the moon's surface sublimates -- that is, turns from solid to gas.