Some images to help orient you in the midst of Whitehead’s categoreal forest.
Category: cosmology – Page 187
Astronomers spotted the wake left by the supermassive black hole as it barrels across the disk after being kicked out during a galactic merger.
Dark energy is the name physicists have given to the mysterious thing driving the universe’s accelerated expansion. It may be a force or a form of energy, and one piece of evidence suggests it is hidden inside black holes.
These hypothetical stars are the densest objects in the universe that can exist without becoming full-fledged black holes.
The cosmic web is the term used to refer to the clusters, filaments, and voids that make up the large-scale structure of the Universe. In Λ cold dark matter (ΛCDM) cosmology, this web is formed from the anisotropic gravitational collapse of matter from primordial overdensities.
We’ve been able to map the Cosmic Web through observation over the past few decades, which opens up the possibility of finding answers to some of astronomy’s most pressing issues. An area of particular interest is how magnetic fields behave on a cosmic scale and their role in galactic and cosmic structure formation.
ICRAR scientists discover tantalizing evidence of magnetic fields in the universe’s most significant cosmic structures.
Using data from ESA’s Gaia astrometry mission, astronomers have identified the closest known black hole.
A black hole is a place in space where the gravitational field is so strong that not even light can escape it. Astronomers classify black holes into three categories by size: miniature, stellar, and supermassive black holes. Miniature black holes could have a mass smaller than our Sun and supermassive black holes could have a mass equivalent to billions of our Sun.
Sir Roger Penrose, a mathematician and physicist from the University of Oxford who recently shared this year’s Nobel Prize in physics, says that our universe has undergone numerous Big Bangs, with another one on the way.
Throughout billions of years, galaxies expand and evolve through the appropriately titled “galactic immigration” events, which involve the formation of new stars and mergers with other galaxies. Scientists examine the movements of individual stars within a galaxy and its wide halo of stars and dark matter to learn more about the histories of these immigration episodes. But until now, such cosmic archaeology has only been possible in our galaxy, the Milky Way.
An international team of researchers has uncovered striking new evidence of a large galactic immigration event in the Andromeda Galaxy. Star motions exhibit complex patterns indicating migratory history similar to the Milky Way. The new findings were attained using Nicholas U.’s Dark Energy Spectroscopic Instrument, which the DOE operates.
A team of astronomers studied the motions of nearly 7,500 stars in the inner halo of the Andromeda Galaxy, also known as Messier 31 (M31). They found patterns in their positions and motions that indicated how these stars originated as a part of an earlier galaxy that joined M31 about 2 billion years ago. Although such patterns have long been anticipated by theory, they have never been observed in a galaxy with such clarity.
Year 2020 :3.
Atoms are made of protons, neutrons and electrons. And they are small. So small that 100 million hydrogen atoms would span the width of your fingernail. String theory proposes that at the most fundamental level of space there are objects that are much smaller than these elementary particles: tiny little filaments of energy, called “strings.”
One of the most awaited events in modern astronomy may be upon us shortly, according to experts.