ESA Top News 30 Apr 2020, 15:30 UTC A reasonably small 4-8 m asteroid recently flew by Earth, passing close to satellites orbiting in the geostationary ring at a distance of about 42 735 km from Earth’s centre and only about 1200 km from the nearest satellite.
NASA's Goddard Space Flight Center 29 Apr 2020, 18:16 UTC New analysis published today in the Astrophysical Journal Letters provides a possible explanation for the origin of switchbacks — sudden reversals in the magnetic field of the solar wind — first observed by Parker Solar Probe during its November 2018 solar flyby. A new paper by scientists Justin Kasper and Lennard Fisk of the University of Michigan suggests the origin of switchbacks are related to the way the Sun maintains and moves magnetic field lines that stretch out into the solar system, tied to a theory first proposed more than two decades ago.
Hubble Space Telescope News 28 Apr 2020, 17:00 UTC The comet was first discovered in December 2019 by the ATLAS (Asteroid Terrestrial-impact Last Alert System) robotic astronomical survey system in Hawaiʻi, USA. It brightened quickly until mid-March, and some astronomers initially anticipated that it might be visible to the naked eye in May to become one of the most spectacular comets seen in the last two decades.
NASA's Goddard Space Flight Center 27 Apr 2020, 15:00 UTC For the first time, NASA’s Neil Gehrels Swift Observatory tracked water loss from an interstellar comet as it approached and rounded the Sun. The object, 2I/Borisov, traveled through the solar system in late 2019.
Hubble Space Telescope News 24 Apr 2020, 11:00 UTC On 24 April 1990 the Hubble Space Telescope was launched aboard the space shuttle Discovery, along with a five-astronaut crew. Deployed into low-Earth orbit a day later, the telescope has since opened a new eye onto the cosmos that has been transformative for our civilization.
NASA's Chandra X-ray Observatory 23 Apr 2020, 18:19 UTC Data from NASA's Chandra X-ray Observatory and ESA's XMM-Newton indicate that a star survived a close call with a black hole, as described in our latest press release. As a red giant star approached a supermassive black hole in the galaxy GSN 069, it was caught in the black hole's gravity.
ESA Top News 22 Apr 2020, 07:20 UTC Today marks the 50th anniversary of Earth Day. For Earth-observing satellites, every day is Earth Day. While news of COVID-19 dominates headlines and many of us practice social distancing, there still remains the need for action on climate change – and satellites are vital in providing the key facts on this global issue.
NASA's Goddard Space Flight Center 21 Apr 2020, 15:55 UTC Earth can sometimes feel like the last place you’d want to be. Indeed, a number of explorers have devised inventive ways to move civilization off this planet. It’s no surprise: The promise of a better life in the mysterious beyond can be seductive. But the fact is the more we learn about out there the more we realize how special it is here. The first astronauts to look from space back at Earth, a “pale blue dot, the only home we've ever known,” as scientist Carl Sagan once wrote, saw a beautiful, delicate world that is perfectly suited to the bounty of life it supports.