Journey across starburst galaxy NGC 4449 in amazing Gemini North Telescope view - YouTube - astrophysics/cosmology

NGC 4449 is an irregular Magellanic type galaxy in the constellation Canes Venatici,and is around 13 million light years away.It is relatively close to the Local Group of galaxies that includes the Milky Way.The images were released to commemorate the 25th anniversary of the Gemini North Tescope.*NGC 4449 is a starburst galaxy,meaning it is a nursery for new stars.The Gemini North Telescope in the International Gemini Observatory,Mt.Mauna Kea,Hawaii,provided the images.*Cosmology is the study of the origins and structures of the universe.* Credit:Images and Videos-International Gemini Observatory/NOIRLab/National Science Foundation/AURA,N. Bartmann (NSF NOIRLab)

Mauna Kea Observatory - A Night in the Life of an Astronomer Time Lapse - YouTube

Observatories use laser beams primarily for a technique called adaptive optics.This method helps astronomers get clearer images of celestial objects by compensating for the distortion caused by Earth's atmosphere.The lasers excite atoms,causing them to glow and form 'artificial stars',which advanced telescopes can use to compensate their mirrors,creating sharper images.

Astronomers find most distant merging quasars yet - YouTube - Space.com - cosmology

Credit:NOIRLab/National Science Foundation/Aura A quasar is an extremely luminous Active Galactic Nucleus (AGN).It is also known as a Quasi-Stellar Object.The emission from an AGN is powered by a supermassive black hole.Quasars emit gigantic amounts of radiation,sometimes more than all radiation from one large galaxy.They are so bright,they can be seen in the far reaches in the universe.This pair of merging quasars date back to only 990 million years after the Big Bang. They were discovered by the combined efforts of the Gemini North Telescope and Subaru Telescope on Mt.Mauna Kea,Hawaii.*Cosmology is the study of the origin and structures of the universe.