Galactic Winds -‘Reveal Missing Matter of the Universe’

 

Galactic Winds

 

One of the major problems in understanding the formation of galaxies is that approximately 80% of the baryons that make up the normal matter of galaxies is missing, expelled over eons from galaxies into inter-galactic space by the galactic winds created by stellar explosions.

(more…)

‘The Empty-Sky Gamma-Ray Mystery’ -Evidence of Dark Matter?

 

Milky Way Gamma-Ray Sky

 

“Something like the diffuse glow of gamma ray background that permeates our Milky Way Galaxy could conceivably be evidence for dark matter,” researcher Mark Krumholz, a theoretical and computational astrophysicist at  Australian National University, told The Daily Galaxy.

(more…)

Silicon Valley’s Wild Bet on Living Forever to Continents of Earth’s Underworld –Planet Earth Report

Earth from Space

 

“Planet Earth Report” provides descriptive links to headline news by leading science journalists about the extraordinary discoveries, technology, people, and events changing our knowledge of Planet Earth and the future of the human species.

(more…)

‘Terra Incognita’ -What Lies Beyond the Observable Universe?

Hubble Ultra Deep Field

 

It’s possible that the universe isn’t uniform past what we can see, and conditions are wildly different from place to place, says Caltech astrophysicist Sean Carroll. “That possibility is the cosmological multiverse. We don’t know if there is a multiverse in this sense, but since we can’t actually see one way or another, it’s wise to keep an open mind.”

(more…)

Fast Facts About Old Stars of the Universe

 

star cluster NGC 1866

 

Determining the age of a star can be one of the trickiest measurements an astronomer can make.  Stars don’t obviate their age like humans do — with wrinkles around the eyes, grey hair, or brittle bones.  Instead stars give hints at their age through things like their motion, rotation rate, chemistry, and placement in the Galaxy. Finding “extrema” on the age spectrum for stars — the oldest and youngest — is much easier than trying to find middle aged objects like our Sun.   In this article, we reveal four fast facts about the oldest stars in the Galaxy.

(more…)

Hubble Images of a Supernova -May Help Solve Known Unknowns of the Universe

 

"SN-Requiem"

 

An enormous amount of gravity from a cluster of distant galaxies causes space to curve so much that light from more distant galaxies is bent. This “gravitational lensing” effect has allowed University of Copenhagen astronomers to observe the same exploding star –SN Requiem–in three different places in the heavens, and may help solve the mystery of cosmic expansion and reveal the nature of dark matter and dark energy.

(more…)