ESA

The Crew-12 mission crew: Andrey Fedyaev, Jack Hathaway, Jessica Meir, and Sophie Adenot.

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A little while ago, SpaceX’s Crew Dragon Freedom spacecraft blasted off atop a Falcon 9 rocket from the Kennedy Space Center in its Crew-12 or SpaceX Crew-12 mission. After almost exactly ten minutes, it successfully separated from the rocket’s last stage and went en route to carry out its mission. This is the 12th crewed mission of the Crew Dragon spacecraft within the normal rotation of the International Space Station crew.

The Sentinel-6B satellite blasting off atop a Falcon 9 rocket (Image courtesy SpaceX)

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A few hours ago, the Sentinel-6B satellite was launched atop a Falcon 9 rocket from the Vandenberg base. After about 57 minutes, it successfully separated from the rocket’s last stage and set off on its course to reach the polar orbit at 1,336 kilometers altitude where its scientific mission will begin, taking over from the Sentinel-6A Michael Freilich satellite, which was launched on November 21, 2020.

The Sentinel-1D satellite blasting off atop an Ariane 6 rocket (Photo courtesy ESA-CNES-ARIANESPACE/Optique vidéo du CSG–P. Piron. ESA Standard Licence)

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A few hours ago, the Sentinel-1D satellite, part of the Copernicus / GMES, was launched from the Kourou spaceport, in French Guiana, atop an Ariane 6 rocket. After about 34 minutes, the satellite regularly separated from the rocket’s last stage and started sending signals. Its final orbit in low Earth orbit will be at an altitude of about 693 kilometers.

The cosmic wave in red and blue, with stars above the galactic disk in red and the ones below it in blue

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An article published in the journal “Astronomy and Astrophysics” reports the results of a study that provides evidence that a sort of giant cosmic wave is crossing the Milky Way, propagating from the center outward from the galactic disk, causing a corrugation. A team of researchers led by Eloisa Poggio of the Italian National Institute for Astrophysics used data collected by ESA’s Gaia space probe to map the motions of thousands of young giant stars and Cepheids within the corrugation, reconstructing the wave that generates them. The cause may be the aftermath of an ancient collision with a dwarf galaxy, but follow-up studies are needed to assess this and other possible explanations.

The Crew Dragon Grace spacecraft after splashing down (Image courtesy Axiom Space)

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A little while ago, SpaceX’s Crew Dragon Grace spacecraft concluded its Ax-4 mission by splashing down without problems. On board were Shubhanshu Shukla, Peggy Whitson, Sławosz Uznański-Wiśniewski, and Tibor Kapu, who ended this completely private space mission in the Atlantic Ocean after leaving the International Space Station almost 48 hours earlier. Shortly after splashing down, SpaceX’s recovery ship went to retrieve the Grace and its crew to transport them to the coast.