Concepts in Astronomy #21. Finding Planets, Stars and Constellations: Gemini, including Pollux and Castor
astronomy·@marcusantoniu26·
0.000 HBDConcepts in Astronomy #21. Finding Planets, Stars and Constellations: Gemini, including Pollux and Castor
 ## Finding Stars and Constellations: Gemini, including Pollux and Castor # In order to find the constellation of Gemini, we need to draw a line from Rigel to Betelgeuse in the constellation of Orion and continue it for about 1.5 times the distance between those 2 stars. This will takes to the vicinity of Pollux and Castor, the 2 most brilliant starts in the constellation of Gemini. Pollux (Beta Geminorum) is a star which has 8.8 times the radius of the Sun. It is located 33.7 light years from Earth. Castor (Alpha Geminorum) is actually a system of 6 stars. It is located 51 light years from Earth.  **Previous Posts** [Concepts in Astronomy #1. Introduction](https://steemit.com/astronomy/@marcusantoniu26/concepts-in-astronomy-1-introduction) [Concepts in Astronomy #2. The Ecliptic](https://steemit.com/astronomy/@marcusantoniu26/concepts-in-astronomy-2-the-ecliptic) [Concepts in Astronomy #3. The Celestial Equator](https://steemit.com/astronomy/@marcusantoniu26/concepts-in-astronomy-3-the-celestial-equator) [Concepts in Astronomy #4. Right Ascension](https://steemit.com/astronomy/@marcusantoniu26/concepts-in-astronomy-4-right-ascension) [Concepts in Astronomy #5. Declination](https://steemit.com/astronomy/@marcusantoniu26/concepts-in-astronomy-5-declination) [Concepts in Astronomy #6. The Celestial Sphere](https://steemit.com/astronomy/@marcusantoniu26/concepts-in-astronomy-6-the-celestial-sphere) [Concepts in Astronomy #7. Azimuth](https://steemit.com/astronomy/@marcusantoniu26/concepts-in-astronomy-7-azimuth) [Concepts in Astronomy #8. Altitude](https://steemit.com/astronomy/@marcusantoniu26/concepts-in-astronomy-8-altitude) [Concepts in Astronomy #9. The Equatorial Coordinate System](https://steemit.com/astronomy/@marcusantoniu26/concepts-in-astronomy-9-the-equatorial-coordinate-system) [Concepts in Astronomy #10. The Topocentric Coordinate System](https://steemit.com/astronomy/@marcusantoniu26/concepts-in-astronomy-10-the-topocentric-coordinate-system) [Concepts in Astronomy #11. Equinox](https://steemit.com/astronomy/@marcusantoniu26/concepts-in-astronomy-11-equinox) [Concepts in Astronomy #12. Solstice](https://steemit.com/astronomy/@marcusantoniu26/concepts-in-astronomy-12-solstice) [Concepts in Astronomy #13. Rotation Period](https://steemit.com/astronomy/@marcusantoniu26/concepts-in-astronomy-13-rotation-period) [Concepts in Astronomy #14. Orbital Period](https://steemit.com/astronomy/@marcusantoniu26/concepts-in-astronomy-14-orbital-period) [Concepts in Astronomy #15. Axial Precession](https://steemit.com/astronomy/@marcusantoniu26/concepts-in-astronomy-15-axial-precession) [Concepts in Astronomy #16. Axial Tilt](https://steemit.com/astronomy/@marcusantoniu26/concepts-in-astronomy-16-axial-tilt) [Concepts in Astronomy #17. Finding Planets, Stars and Constellations: Polaris](https://steemit.com/astronomy/@marcusantoniu26/concepts-in-astronomy-17-finding-stars-and-constellations-polaris) [Concepts in Astronomy #18. Finding Planets, Stars and Constellations: Ursa Major and the Big Dipper](https://steemit.com/astronomy/@marcusantoniu26/concepts-in-astronomy-18-finding-planets-stars-and-constellations-ursa-major-and-the-big-dipper) [Concepts in Astronomy #19. Finding Planets, Stars and Constellations: Orion](https://steemit.com/astronomy/@marcusantoniu26/concepts-in-astronomy-19-finding-planets-stars-and-constellations-orion) [Concepts in Astronomy #20. Finding Planets, Stars and Constellations: Sirius](https://steemit.com/astronomy/@marcusantoniu26/concepts-in-astronomy-20-finding-planets-stars-and-constellations-sirius) ###### Credits ###### - Galaxy image obtained from Pixabay under [CC0](https://creativecommons.org/publicdomain/zero/1.0/deed.en). No Copyright. The person who associated a work with this deed has dedicated the work to the public domain by waiving all of his or her rights to the work worldwide under copyright law, including all related and neighboring rights, to the extent allowed by law ###### - Orion and Gemini Image © 2018 marcusantoniu26. All rights reserved. Created using Stellarium
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