What Processes Cause the “Variable S Doradus” Stars To Explode As Supernovae? (Cosmology)

What processes cause the “variable S Doradus” (Lbv, in English) stars to explode as supernovae? Do they go through the Wolf-Rayet star phase or not? To investigate the phenomenon, a team of astronomers led by Sabina Ustamujic of the INAF of Palermo has developed a three-dimensional hydrodynamic model that follows the evolution of the material ejected by … Continue reading What Processes Cause the “Variable S Doradus” Stars To Explode As Supernovae? (Cosmology)

Gaia reveals that most Milky Way companion galaxies are newcomers to our corner of space (Cosmology)

Data from ESA’s Gaia mission is re-writing the history of our galaxy, the Milky Way. What had traditionally been thought of as satellite galaxies to the Milky Way are now revealed to be mostly newcomers to our galactic environment. A dwarf galaxy is a collection of between thousand and several billion stars. For decades it has been … Continue reading Gaia reveals that most Milky Way companion galaxies are newcomers to our corner of space (Cosmology)

Hubble Witnesses Shock Wave of Colliding Gases in Running Man Nebula (Cosmology)

Mounded, luminous clouds of gas and dust glow in this Hubble image of a Herbig-Haro object known as HH 45. Herbig-Haro objects are a rarely seen type of nebula that occurs when hot gas ejected by a newborn star collides with the gas and dust around it at hundreds of miles per second, creating bright … Continue reading Hubble Witnesses Shock Wave of Colliding Gases in Running Man Nebula (Cosmology)

Hubble Spots a Swift Stellar Jet in Running Man Nebula (Cosmology)

A jet from a newly formed star flares into the shining depths of reflection nebula NGC 1977 in this Hubble image. The jet (the orange object at the bottom center of the image) is being emitted by the young star Parengo 2042, which is embedded in a disk of debris that could give rise to … Continue reading Hubble Spots a Swift Stellar Jet in Running Man Nebula (Cosmology)

WHAT IT’D BE LIKE TO FALL INTO A BLACK HOLE? (Cosmology)

Writer’s note: If you want the full, terrifying experience of falling into a black hole in this 360° video make sure to turn on your sound.  It’s hard to go a day without hearing about black holes. Perhaps about how the regions of spacetime are key for the “midlife crises” of some galaxies, for example. But … Continue reading WHAT IT’D BE LIKE TO FALL INTO A BLACK HOLE? (Cosmology)

Yellow Supergaint Vs. Blue Straggler: Was J01020100-7122208 Really Ejected From Black Hole Or SMC? (Cosmology)

K. Hawkins and colleagues performed a detailed analysis of J01020100-7122208 with the goal of shedding light on its origin. They proposed that, instead of yellow super giant and red giant, it is probably an evolved blue straggler. Their study recently appeared in Arxiv. In 2018, astronomers using telescopes in northern Chile have discovered a rare runaway star … Continue reading Yellow Supergaint Vs. Blue Straggler: Was J01020100-7122208 Really Ejected From Black Hole Or SMC? (Cosmology)

Black Hole Found Hiding In Star Cluster Outside Our Galaxy (Cosmology)

Using the European Southern Observatory’s Very Large Telescope (ESO’s VLT), astronomers have discovered a small black hole outside the Milky Way by looking at how it influences the motion of a star in its close vicinity. This is the first time this detection method has been used to reveal the presence of a black hole … Continue reading Black Hole Found Hiding In Star Cluster Outside Our Galaxy (Cosmology)

Astronomers Unveil the Internal Structure of Hercules Supercluster (Cosmology)

Monteiro-Oliveira and colleagues investigated the structure of the Hercules supercluster (SCL160) based on data originally extracted from the Sloan Digital Sky Survey SDSS-DR7. They have confirmed that the Hercules supercluster is composed of the galaxy clusters A2147, A2151, and A2152 and these galaxy clusters composed of subclusters. Their study recently appeared in Arxiv. The Hercules Superclusters (SCl … Continue reading Astronomers Unveil the Internal Structure of Hercules Supercluster (Cosmology)

Mysterious “Superbubble” Hollows Out Nebula in New Hubble Image (Cosmology)

N44 is a complex nebula filled with glowing hydrogen gas, dark lanes of dust, massive stars, and many populations of stars of different ages. One of its most distinctive features, however, is the dark, starry gap called a “superbubble,” visible in this Hubble Space Telescope image in the upper central region. The hole is about … Continue reading Mysterious “Superbubble” Hollows Out Nebula in New Hubble Image (Cosmology)