Astronomy / Astrophysics

Blogs about Astronomy and Astrophysics

The ESCAPADE twin probes blasting off atop a New Glenn rocket (Image courtesy Blue Origin)

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A few hours ago, NASA’s ESCAPADE (Escape and Plasma Acceleration and Dynamics Explorers) twin probes were launched atop a Blue Origin New Glenn rocket, which accomplished its mission, called NG-2. One goal for Blue Origin was to land the first stage, which was a successful one just over 9 minutes after launch. After approximately 33 minutes, the probes, named Blue and Gold, separated from the rocket’s second stage and began a long journey to Mars to study its magnetosphere and the Sun’s impact on the red planet.

Galaxy NGC 3621 with the location of supernova SN 2024ggi in the small circle

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An article published in the journal “Science Advances” reports the first reconstruction ever of the shape of a Type II supernova in its early stages. A team of researchers led by Professor Yi Yang of Tsinghua University in Beijing, China, used observations conducted with ESO’s Very Large Telescope (VLT) in Chile to study the supernova cataloged as SN 2024ggi on April 11, 2024, the day after the explosion began.

The 4MOST instrument mounted on the VISTA telescope (Photo AIP/A. Saviauk)

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On October 18, the 4-meter Multi-Object Spectroscopic Telescope (4MOST), mounted on ESO’s VISTA telescope in Chile, saw its so-called first light in its initial observation tests. With its system made of 2,436 optical fibers, 4MOST can capture light from a field of view with a diameter of up to 2.5 degrees, which in practice translates to an area equivalent to 16 times the size of the full Moon. The light is directed into three spectrographs that divide it into color components in the visible light range, providing individual spectra. This will enable a cosmological survey encompassing 25 million objects in the first five years of its operation.

An optical-frequency image from the Legacy Surveys overlaid with radio emissions from the LoTSS survey, revealing the area of ​​the odd radio circle RAD J131346.9+500320

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An article published in the journal “Monthly Notices of the Royal Astronomical Society” reports the discovery of three odd radio circles, including a pair cataloged as RAD J131346.9+500320. The discovery was made by examining data collected during the LOFAR Two-Metre Sky Survey (LoTSS) thanks to the collaboration of citizen scientists in the RAD@home program. A team of researchers examined these objects, and in particular, what appears to be a pair of intersecting rings, concluding that they’re the most distant discovered so far and that their emissions are the most powerful detected from these still poorly-known cosmic objects.

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.