What's the difference between RA/DEC and Alt/Az? Why use both? In this video I will explain what a coordinate system is, and why we often use both an equatorial coordinate system (RA/DEC) and a horizontal coordinate system (Alt/Az) in amateur astronomy. This is part of a series called Five Minute Fridays where I will be explaining one concept in under five minutes each week. #fiveminutefridays #nebulaphotos

Book recommendation Longitude by Dava Sobel: https://amzn.to/3itld5o

=============================
Supporting this channel:
=============================
◦ I'm on Patreon:   / nebulaphotos  
◦ Onetime donations: https://paypal.me/nebulaphotos
◦ Shopping for astrophotography gear, you can use my affiliate links:
High Point Scientific: https://tinyurl.com/highpointnebula
OPT: https://bit.ly/31XDk9d
Agena Astro: https://tinyurl.com/agenanebula
Amazon: https://amzn.to/31rYb56
Modification service at Astrogear.net: https://www.astrogear.net/?ref=nebula...
◦ You can use my referral code when buying subscriptions to Astrobin:
New accounts www.astrobin.com/accounts/register/?r=NEBULAPHOTOS
Existing accounts Use Promo Code: NEBULAPHOTOS

=============================
Social:
=============================
Twitter: @nebulaphotos
Instagram: @nebulaphotosdotcom
Astrobin: https://www.astrobin.com/users/2ghouls/​

=============================
Creative Commons Media:
=============================
Celestial Sphere by ChristianReady, CC BYSA 4.0, via Wikimedia Commons
Ra and Dec on celestial sphere by Tfr000 CC BYSA 3.0 via Wikimedia Commons
Ra and dec demo by Tfr000, CC BYSA 3.0, via Wikimedia Commons