Astronomie, Raumfahrt, Space Art & mehr
Canadian and US astronomers have located what is thought to be the closest neutron star ever seen. The exotic object, nicknamed „Calvera“ (after the villain in the movie „The Magnificent Seven“), is located in the constellation Ursa Minor, somewhere between 250 and 1.000 light-years away.
McGill University: Our neighbour, the neutron star
Penn State University: Possible closest neutron star to Earth found
Aufnahmen des Galaxienhaufens Hydra I (auch bekannt als Abell 1060), der sich in einer Entfernung von 176 Millionen Lichtjahren befindet, zeigen eine Anhäufung von massereichen, hellen und metallreichen Kugelsternhaufen, die offenbar ultra-kompakte Zwerggalaxien sind.
Uncovering a Missing Link Between Dwarf Galaxies and Globular Clusters
Neue Hinweise des Weltraumteleskops Spitzer zeigen, dass supermassereiche Schwarze Löcher im Zentrum von elliptischen Galaxien das galaktische „Thermostat“ so hoch halten, dass Gas nicht abkühlen kann und somit eine Sternentstehung verhindert wird.
Do Supermassive Black Holes Stunt Stellar Birth in Galaxies?
The dying star Mira A is hurtling through space, leaving a comet-like tail of glowing gas 13 light-years long that reveals its history stretching back 30.000 years. The tail may also help explain how life’s ingredients get spread through space.
Speeding-Bullet Star Leaves Enormous Streak Across Sky
A newly released photograph taken by the Spitzer Space Telescope shows a previously hidden star cluster, revealed now in the infrared spectrum. At visible wavelengths, this cluster, located in the southern portion of the Serpens cloud, would be totally obscured by dust. But now, thanks to Spitzer, we can see it for the first time.
Four galaxies are slamming into each other and kicking up billions of stars in one of the largest cosmic smash-ups ever observed. The clashing galaxies, spotted by NASA’s Spitzer Space Telescope, will eventually merge into a single galaxy up to 10 times as massive as our own Milky Way. This rare sighting provides an unprecedented look at how the most massive galaxies in the universe form.
Whopper Galaxy Collision
The Hubble Space Telescope has photographed three magnificent sections of the Veil Nebula – the shattered remains of a supernova that exploded some 5 to 10.000 years ago. The new Hubble images provide beautiful views of the delicate, wispy structure resulting from this cosmic explosion.
https://esahubble.org/news/heic0712/
University of Arizona astronomers who are probing the oxygen-rich environment around a supergiant star with one of the world’s most sensitive radio telescopes have discovered a score of molecules that include compounds needed for life.
A unique set of observations has allowed astronomers to find direct evidence for the material that surrounded a star before it exploded as a Type Ia supernova. This strongly supports the scenario in which the explosion occurred in a system where a white dwarf is fed by a red giant.
The Gobbling Dwarf that Exploded
Abstract: Detection of Circumstellar Material in a Normal Type Ia Supernova
The most detailed survey of the entire sky at infrared wavelengths has been made by Japan’s AKARI satellite. It will help astronomers produce a complete census of all nearby galaxies.
After one year of observations; The Universe as seen by AKARI (July 11, 2007)