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Copernicus sea-level satellite arrives safely in California
The launch of the Copernicus Sentinel-6 Michael Freilich satellite – designed to measure the height of the ocean – is getting tantalisingly close. The satellite has now safely touched down at the Vandenberg Air Force Base in central California, where mission teams are busily preparing the satellite for its upcoming journey.
20 years of ice-cold research: extremophile tips for healthy living
This year marks two decades since the first ESA doctor set foot in Antarctica, running research at one of the most extreme places on Earth in preparation to explore far beyond it.
Week in images: 21-25 September 2020
Week in images: 21-25 September 2020 Discover our week through the lens
Image: Copernicus Sentinel-2 takes us over the Tarawa Atoll in the Republic of Kiribati – a remote Pacific nation threatened by rising seas.
Earth from Space: Tarawa, Kiribati
Video: 00:03:27 In this week's edition of the Earth from Space programme, Copernicus Sentinel-2 takes us over the Tarawa Atoll in the Republic of Kiribati – a remote Pacific nation threatened by rising seas.See also Tarawa, Kiribati to download the image.
ESA Open Day 2020 on the way
Video: 00:00:40 Coming on Sunday 4 October: this year's online #ESAOpenDay at #ESTEC. Your chance to talk direct to #astronauts and space experts, plus take virtual tours around (and under!) ESA's largest establishment.Anyone can take part but they must register first.
SEOSAT-Ingenio arrives in French Guiana
After leaving the Airbus premises in Madrid on 24 September, the Spanish high-resolution land imaging mission, known as SEOSAT-Ingenio, has arrived safely at Europe’s Spaceport in French Guiana, where it will be prepared for launch later this year.
Observed binary populations reflect the Galactic history
10. Planets and planetary systems Observed binary populations reflect the Galactic history by J. Vos, A. Bobrick, M. Vučković 2020, A&A, 641, A163 The authors demonstrate, for the first time, that the observed orbital period-mass ratio correlation of subdwarf B (sdB) binaries is caused by the metallicity history of our Galaxy. Metal-rich low-mass stars have larger radii at the tip of the first giant branch (FGB) than metal-poor low-mass stars. Consequently, the stable mass transfer of a metal-rich low-mass donor star ascending to the tip of the FGB leads to the formation of sdB binaries with longer orbital periods. The narrow sdB mass range, the narrow mass ratio range in the original binaries which lead to sdBs, and the Galaxy chemical evolution model, therefore, create the observed strong P-q correlation. We may see similar metallicity effects for other binaries which resulted from stable mass transfer of low-mass red giant donors, and we may expect that the accurately measured properties of the low-mass exotic binaries will provide new constraints on chemical evolution studies of the Galaxy.
Behold The Helix Nebula As Seen By Four Telescopic Eyes
When a star like the Sun runs out of fuel, it expands and its outer layers puff off, and then the core of the star shrinks....
Asteroid 2020 SW Flew Safely Past Earth Today
A small near-Earth asteroid designated 2020 SW made its closest approach to Earth today at 7:12 a.m. EDT (4:12 a.m. PDT) at a distance of about 22,000 km (13,000 miles). 2020 SW was discovered on September 18, 2020, by astronomers using the NASA-funded Catalina Sky Survey in Arizona. Follow-up observations confirmed its orbital trajectory to [...]