Physics World Blog 23 Apr 2020, 10:38 UTC An enigmatic object once thought to be a massive exoplanet is more likely to be the remnants of a catastrophic collision between two comet-like bodies, two US astronomers have shown. Andras Gaspar and George Rieke at the University of Arizona made the discovery after re-analysing observations of the Fomalhaut system made by the Hubble Space Telescope (HST). Their proposal could improve our understanding of how orbiting bodies can destroy each other, even in more peaceful star systems.
Parabolic Arc 23 Apr 2020, 00:00 UTC In 1970, the United States Clean Air Act underwent major revisions to reduce pollution and protect air quality, President Nixon created the Environmental Protection Agency, and NASA scientists were cracking open the door on a new era of studying our home planet from space. The first black-and-white satellite images of Earth were just ten years old: a swirling mass of white clouds over back oceans. The first measurements of Earth’s temperature from space were made just a year prior in 1969 by Nimbus 3, a joint mission with the National Oceanic and Atmospheric Administration, which became a major step in improving weather forecasts.
Universe Today 22 Apr 2020, 18:53 UTC Farewell! Even though the BepiColombo mission launched for Mercury in 2018, it’s still hanging around the Earth – at least, briefly, as shown in this stunning image recently released by the European Space Agency.
Sky and Telescope 22 Apr 2020, 11:09 UTC For the first time, the LIGO and Virgo gravitational-wave detectors have “heard” gravitational waves from an unequal pair of black holes. Scientists working with the LIGO and Virgo gravitational-wave observatories have detected an oddball event: the merger of two black holes of notably different sizes.
ABC 21 Apr 2020, 02:26 UTC For 30 years and counting, the Hubble Space Telescope has taken us on a journey through the cosmos from auroras on Jupiter to some of the earliest galaxies in the Universe. "It's just given us an extraordinary window on the Universe that really has been unmatched...by ground-based telescopes," said Fred Watson, Australia's Astronomer-at-large.
Physics World Blog 20 Apr 2020, 15:00 UTC The Hubble Space Telescope was launched on 24 April 1990. To celebrate its 30th anniversary in space, Physics World is publishing a series of blog posts exploring Hubble’s 10 best images, as chosen by the science journalist and editor Keith Cooper