Astronomy Pictures of the Day
Observatory / Course Archives / ASTR 110 Fall 2019 / Curtis
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Milky Way -
Crab Nebula -
51 Pegasi b
Milky Way
The Milky Way is the galaxy that contains our solar system. It is a spiral structure with two main "arms " that appear to be wrapping around the central bar of stars. If you look closely, you can see two other "arms " in between the two main arms. The two major arms contain both old and new stars, while the two minor arms contain mainly gas and pockets of star forming activity
https://solarsystem.nasa.gov/resources/285/the-milky-way-galaxy/
https://en.wikipedia.org/wiki/Milky_Way
https://www.space.com/19915-milky-way-galaxy.html
https://imagine.gsfc.nasa.gov/science/objects/milkyway1.html
https://www.britannica.com/place/Milky-Way-Galaxy
Crab Nebula
The Crab Nebula is a remnant of a supernova located in the constellation Taurus. It was discovered in 1054 AD by chinese astronomers. It is assumed to be around 10 light years in diameter, and about 6,500 lightyears away from Earth. The blue light seen on the interior of the nebula is formed by electrons traveling at about the speed of light around the magnetic field lines of the star.
https://www.inverse.com/article/31437-photos-nebula-scientists-telescopes
https://www.nasa.gov/feature/goddard/2017/messier-1-the-crab-nebula
https://en.wikipedia.org/wiki/Crab_Nebula
https://www.space.com/16989-crab-nebula-m1.html
https://earthsky.org/clusters-nebulae-galaxies/crab-nebula-was-an-exploding-star
51 Pegasi b
The 51 Pegasi B was discovered on October 6th, 1995 by two Swiss astronomers. It is located about 50 light years away in the constellation Pegasus. This was the first exoplanet discovered that was orbiting a main sequence star. It moves at an orbital speed of about 136 km/s, and orbits the star in around 4 days. The 51 Pegasi B is a prototype of a type of planet called "Hot Jupiters ".
https://www.theatlantic.com/science/archive/2018/04/tess-exoplanet-nasa-51-pegasi/558011/
https://en.wikipedia.org/wiki/51_Pegasi_b
https://earthsky.org/space/this-date-in-science-first-planet-discovered-around-sunlike-star