Take a 360 Tour of COBE's Cosmic Baby Picture - YouTube - NASA Goddard - cosmology

The NASA COBE satellite operated from 1989-1993.It took the first baby picture of the universe,revealing slight temperature variations when the universe was just 380,000 years old.In the aftermath of the Big Bang,the universe was hotter and much smaller than it is now.As time went on,it cooled off and expanded to a huge extent,using the dark matter and energy residue of the Big Bang.This image shows the entire sky using four years of observations using COBE's Differential Microwave Radiometer.The central plane of our Milky Way galaxy runs across the middle and its center is marked by a white X.Red indicates hotter regions,blue colder.The fluctuations are very faint,varying by only one part in a 100,000 from the average temperature.They represent density variations in the early universe thought to have given rise to the structures that we see today.After stripping away foreground emmission arising from dust,hot gas and charged particles interacting with magnetic fields in our galaxy,COBE data revealed tiny variations in the temperature of the Cosmic Microwave Background (CMB)-the oldest light in the universe-for the first time.*Cosmology is the study of the origin,evolution and structures of the universe.*Credit:NASA Goddard Spaceflight Center in Greenbelt,Maryland*Image credit:NASA/COBE Science Team*Narrator:Thomas Essinger Hileman (NASA/GSFC)*Science Writer:Francis Reddy (University of Maryland College Park)*Text by NASA Goddard and edited and augmented by Andrew Taylor

The Cosmic Dark Ages - YouTube - PBS Space Time - astrophysics/cosmology

Dr.Matt O'Dowd is an Australian astrophysicist who presented and wrote this episode of PBS Space Time.Recombination:In the blazing heat of the Big Bang,atoms were stripped of their electrons.This was gradually reversed in the reionisation era.The first light was the Cosmic Microwave Backgoround (CMB).The first stars were formed about 150 million years after the Big Bang.Before that were the Cosmic Dark Ages.*Cosmology is the study of the origin,evolution and structures of the universe.

Did JWST Discover Dark Matter Stars? - YouTube - PBS Space Time - astrophysics/cosmology

The NASA/ESA/CSA James Webb Space Teslescope may have discovered a new class of objects called dark stars,which are actually very bright,bright enough for the JWST to detect them at their enormous distances,having existed just 400,000,000 years after the Big Bang.* Rules for dark matter particles to create dark stars:1.Particle cannot interact strongly with itself 2.Must have weak self-interaction 3.Must be able to annihilate each other*The self-annihilation of dark matter particles is what makes dark stars so bright.*Dark stars may have given rise to the supermassive black holes at the center of galaxies.*Dr.Matt O'Dowd is an Australian astrophysicist who is the presenter and writer or co-writer of PBS Space Time.*Cosmology is the study of the origin,evolution and structures of the universe.

Secrets of the Cosmic Microwave Background - YouTube - PBS Space Time - astrophysics

with Dr.Matt O'Dowd,PhD (astrophysics),writer and host of PBS Space Time*The universe is flat.The era of radiation following the Big Bang evolved to the era of dark matter and dark energy.*CMB was discovered by Arno Penzias and Robert Wilson in 1965.They were working for Bell Labs in New Jersey and stumbled upon this discovery while trying to eliminate noise from their radio telescope.Their finding provided strong evidence for the Big Bang and earned them the Nobel Prize in Physics in 1978.