Uploaded October 2022 | Updated September 2026, 2 weeks ago
Our Socratica Astronomy series is back! Bookmark the playlist here:
✷ socratica.link/Astro_Playlist
Join our ASTRO email list so we can notify you when new videos go live:
✷ snu.socratica.com/astronomy
Meet our STELLAR intern Alivia Brown!
✷ youtube.com/AliviaBrown
✵✵✵✵✵ Measuring LIGHT in Astronomy
Just How Bright are stars, really?
From ancient times, people have been looking at the stars and deciding this one is brighter than that one. But how do you know if a star is actually brighter, or just closer to you? Astronomers use a wide variety of terms to distinguish between how bright a star LOOKS to us, and how much light it is actually producing. These terms can be very confusing! But we'll help you figure it all out.
✵✵✵✵✵ CHAPTERS
You can jump to chapters in the video here:
0:00 How bright are stars?
0:22 Apparent Magnitude (Hipparchus & Ptolemy)
3:00 Luminous Flux
4:00 Inverse Square Law
4:35 Intrinsic Brightness vs Apparent Brightness
5:35 Solar Luminosities
6:34 Absolute Magnitude
8:07 Distance Modulus
9:06 Standard Candles
9:48 Cepheid Variable Stars
✵✵✵✵✵ THANKS TO OUR SOCRATICA FRIENDS
Meet our VIP Patrons! These wonderful people include: Tracy Karin Prell, Umar Khan, Scott Dreblow, Philip Rice, Michael Shebanow, MdeG, Marcos Silveira, Kevin B, Kavon Johnson, John Krawiec, Jeremy Shimanek, Eric Eccleston, Carlos Araujo, Alvin Khaled, Robert Fulbright, Marko Popovic, and Christopher Kemsley.
Special Thanks go out to @Launch Pad Astronomy! Liliana & Kimberly attended the annual Launchpad Astronomy Workshop for writers, led by astronomy professors Mike Brotherton & Christian Ready. Read more about our experience here:
✷ launchpadworkshop.org
✷ socratica.com/the-socratica-method/launchies
Christian generously reviewed this script & offered advice. Visit his channel “Launchpad Astronomy” where your friendly neighborhood astronomer keeps you informed about astro news!
✷ youtube.com/c/ChristianReady/videos
✵✵✵✵✵ SUPPORT SOCRATICA
You can support our channel by using our affiliate links. These are books & other resources we can personally recommend. A small % of your purchase (usually 1-2%) will be shared with Socratica by the vendor.
We highly recommend the Astronomy textbook “Universe” by Roger Freedman et al:
✷ 10th Edition amzn.to/2tfBjUe
✷ 11th Edition amzn.to/3mhxqvv
Moon Globe with explorations
✷ amzn.to/3me3kZM
Celestron 6-inch computerized telescope
✷ amzn.to/3mhdysk
Our STUDY TIPS BOOK is now available!
How To Be a Great Student
✷ e-book: amzn.to/2Lh3XSP
✷ Paperback: amzn.to/3t5jeH3
Or read for free when you sign up for Kindle Unlimited:
✷ amzn.to/3atr8TJ
Shop Amazon Used Textbooks - Save up to 90%
✷ amzn.to/2pllk4B
✵✵✵✵✵ MORE WAYS TO SUPPORT SOCRATICA
JOIN this channel for cute owl badges:
✷ bit.ly/SocraticaBadges
SUBSCRIBE to Socratica:
✷ bit.ly/SocraticaSubscribe
SUPPORT Socratica on Patreon:
✷ patreon.com/socratica
DONATE with Paypal:
✷ paypal.me/socratica
GIFT CRYPTO with Bitcoin:
✷ Our address is bc1qda47tgfyk67lxa7yqn8y5m02hjcglghsd5c58n
✵✵✵✵✵ CREDITS
Presented by Liliana De Castro
Written by Kimberly Hatch Harrison
Edited by Alivia Brown & Kimberly Hatch Harrison
Produced by Kimberly Hatch Harrison & Michael Harrison
Music Credits:
Meditations by Bellodrone
Content ID: D4WARAIPWVVFTKSQ
Breathings by Bellodrone
Content ID: RVFSTIGXKP6O4HS2
#Astronomy #Stars #Brightness
Our Socratica Astronomy series is back! Bookmark the playlist here:
✷ socratica.link/Astro_Playlist
Join our ASTRO email list so we can notify you when new videos go live:
✷ snu.socratica.com/astronomy
Meet our STELLAR intern Alivia Brown!
✷ youtube.com/AliviaBrown
✵✵✵✵✵ Measuring LIGHT in Astronomy
Just How Bright are stars, really?
From ancient times, people have been looking at the stars and deciding this one is brighter than that one. But how do you know if a star is actually brighter, or just closer to you? Astronomers use a wide variety of terms to distinguish between how bright a star LOOKS to us, and how much light it is actually producing. These terms can be very confusing! But we'll help you figure it all out.
✵✵✵✵✵ CHAPTERS
You can jump to chapters in the video here:
0:00 How bright are stars?
0:22 Apparent Magnitude (Hipparchus & Ptolemy)
3:00 Luminous Flux
4:00 Inverse Square Law
4:35 Intrinsic Brightness vs Apparent Brightness
5:35 Solar Luminosities
6:34 Absolute Magnitude
8:07 Distance Modulus
9:06 Standard Candles
9:48 Cepheid Variable Stars
✵✵✵✵✵ THANKS TO OUR SOCRATICA FRIENDS
Meet our VIP Patrons! These wonderful people include: Tracy Karin Prell, Umar Khan, Scott Dreblow, Philip Rice, Michael Shebanow, MdeG, Marcos Silveira, Kevin B, Kavon Johnson, John Krawiec, Jeremy Shimanek, Eric Eccleston, Carlos Araujo, Alvin Khaled, Robert Fulbright, Marko Popovic, and Christopher Kemsley.
Special Thanks go out to @Launch Pad Astronomy! Liliana & Kimberly attended the annual Launchpad Astronomy Workshop for writers, led by astronomy professors Mike Brotherton & Christian Ready. Read more about our experience here:
✷ launchpadworkshop.org
✷ socratica.com/the-socratica-method/launchies
Christian generously reviewed this script & offered advice. Visit his channel “Launchpad Astronomy” where your friendly neighborhood astronomer keeps you informed about astro news!
✷ youtube.com/c/ChristianReady/videos
✵✵✵✵✵ SUPPORT SOCRATICA
You can support our channel by using our affiliate links. These are books & other resources we can personally recommend. A small % of your purchase (usually 1-2%) will be shared with Socratica by the vendor.
We highly recommend the Astronomy textbook “Universe” by Roger Freedman et al:
✷ 10th Edition amzn.to/2tfBjUe
✷ 11th Edition amzn.to/3mhxqvv
Moon Globe with explorations
✷ amzn.to/3me3kZM
Celestron 6-inch computerized telescope
✷ amzn.to/3mhdysk
Our STUDY TIPS BOOK is now available!
How To Be a Great Student
✷ e-book: amzn.to/2Lh3XSP
✷ Paperback: amzn.to/3t5jeH3
Or read for free when you sign up for Kindle Unlimited:
✷ amzn.to/3atr8TJ
Shop Amazon Used Textbooks - Save up to 90%
✷ amzn.to/2pllk4B
✵✵✵✵✵ MORE WAYS TO SUPPORT SOCRATICA
JOIN this channel for cute owl badges:
✷ bit.ly/SocraticaBadges
SUBSCRIBE to Socratica:
✷ bit.ly/SocraticaSubscribe
SUPPORT Socratica on Patreon:
✷ patreon.com/socratica
DONATE with Paypal:
✷ paypal.me/socratica
GIFT CRYPTO with Bitcoin:
✷ Our address is bc1qda47tgfyk67lxa7yqn8y5m02hjcglghsd5c58n
✵✵✵✵✵ CREDITS
Presented by Liliana De Castro
Written by Kimberly Hatch Harrison
Edited by Alivia Brown & Kimberly Hatch Harrison
Produced by Kimberly Hatch Harrison & Michael Harrison
Music Credits:
Meditations by Bellodrone
Content ID: D4WARAIPWVVFTKSQ
Breathings by Bellodrone
Content ID: RVFSTIGXKP6O4HS2
#Astronomy #Stars #Brightness
