Star Magnitude (Brightness) Explained

[@learnthesky]

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[@natesturm448]

I've spent my whole life wandering about the universe. I can't tell you have many 3 hour long lectures and documentaries I've watched and just now I learn what magnitude means. Something new every day.

[@erichowry9356]

Very helpful video! Thanks for posting

[@oxicatblack4626]

very knowledgeable video and your voice is so clear and enjoyable, for the kind of topic 👏 tanks for not adding,back ground music👍🌏😊

[@wormholetocosmos7622]

Absolutely amazing I am so addicted to your videos.👍👍👍

[@droondexdz3451]

Thank you, you are the greatest teacher in the world...

[@ShubhRajputShorts]

What an amazing explanation. Thanks

[@mazyar_]

Thank you for your explanation it's very helpful. Just a sidenote, the image around 1:50 is not of Hipparchus but Raphael's depiction of Zoroaster who was also a legendary astronomer.

[@kurpadmurthy5466]

Great to know the inverse relationship between the Brightness to the magnitude......!! thank you for Great videos.

[@lakshayu1656]

thank you for this video it really helped me

[@kishoregovinde6629]

This video is very informative. Thanks

[@fernandobautista3200]

I wish I knew all of this before, anyway massive thanks to you teacher.

[@elamuruganmahadevan1112]

Thank you. Nicely explained

[@mohammedpatel3051]

Excellent explanation

[@douglasmayer7461]

Great video. Thank you!

[@squadgeman3247]

Lovely video!

[@OkieBobby]

Very much appreciated!!!

[@3d_mihai]

Hi, great video, very informative. You said at 10:34 'James Webb "also" has an infrared camera'? What other cameras does it have?

[@kishoregovinde6629]

Thank you for your videos. Immensely useful in understanding the night sky. 👌👍

[@lakhanshahi3637]

Very very interesting information video. Thanks........from Kathmandu

[@learnthesky]

Hello from the United States! Thank you for watching! 👋

[@n0nenone]

Ayo that was some smooth outro lol ... And nice work

[@nikey6911]

thank you

[@know-ledgeinfo-ledge835]

Thank you ma'am

[@rifatzehra6546]

Heloo , great video But can you make one on the mathematical approach like the calcululation of magnitudes in depths etc

[@poonamkifoodshiksha4972]

Fact: (no hate) but the sirius is -1.65. Just correcting no hate I am addicted to ur videos. Love you❤️✨

[@MarcianoFrancis]

It's actually -1.46 apparent magnitude that is, she just rounded it off, so she is correct.

[@balancius8381]

Thx

[@claudelebel49]

Is there an advantage to having an inverse scale? If not why don't astronomers agree to make it more intuitive?

[@luketube8351]

So many videos on what apparent/absolute magnitude IS, how to USE the numbers on a scale, but no one explains how to FIND those numbers. Where does 0.87 or -0.63 come from ? How do you actually get that number? I know it's to do with filtering light, but I can't find any video that talks about how to get those numbers.

[@learnthesky]

Magnitude can be a frustrating concept. Many of these numbers were first made by Hipparchus. 1st mag = brightest. 6th mag = dimmest. This system carried on for centuries. Once Galileo started seeing more stars with his telescope, he started naming 7th mag, etc….at this point there is a formula on how to calculate it (mentioned in video), and now we don’t rely on human eyes solely for magnitude. We use telescopes to help determine this. The star Vega is the standard for magnitude zero. I hope this helps. I may need to eventually do a video going into the details of this.

[@clarkg9805]

Are you saying that they can only measure stars absolute magnitude if they are at 10 parsecs away from earth, or 32.6 light years? Is that figurative or literal? Do you know if there is a reason for that particular distance to be used for this value determination? Sorry don't mean to be difficult, your video's are very informative, thank-you for sharing. : )

[@learnthesky]

I do not know the reason for why the distance of 10 parsecs (32.6) light years away. I will need to do further digging on that. And this would be a figurative thing. So if you placed the star at 10 parsecs, how bright would it be? I see it as a way to compare stars. Remember that just because a star is bright in our sky, it does not mean it is big, it could just be close. By using absolute magnitude, it allows us to compare a star's size, which is directly related to its brightness. I hope this helps. Magnitude has always been slightly confusing to me, probably because of the inverse scale it has.

[@user-um4di5qm8p]

wow

[@keqinggod6137]

Without stellar magnitude.;..with the same distance which is brighter 1st magnitude or 6th magnitude? i thought sixth magnitude is brighter between the two..limited by its brightness because of the distance

[@claudelebel49]

Is a magnitude 4 object 10X brighter than a mag 5 ?

[@w011i]

I want my natural sky and freedom of pointings

[@malinthadisanayaka9714]

❤❤❤

[@abhilashpradeep6925]

Madam u said that apparent magnitude tells the brightness of star and absolute magnitude tells the brightness of star which is in certain distance,Suppose if the apparent magnitude of a star is 14.5,then it is brightest or low brightest.

[@learnthesky]

A star with a magnitude id 14.5 would be a very dim star. It would be invisible to the naked eye.

[@Hhenryarero]

10

[@opponoastos]

I like to look at Ptolemy's cluster of stars through my telescope.

[@NikomaGrob]

I don't understand how to read a logarythmic scale, I've been googling but I'm probably too retarded. I want to understand how to calculate how much brighter a magnitude 4 is compared to a 6 for example, how do I calculate this.. I don't get it.

[@betaorionis2164]

Logarithmic means that a value 1 unit bigger is x times bigger than the previous unit. You have to multiply by an X factor instead of adding a quantity. In the case of the magnitude of stars, 1 unit of magnitude means approximately 2.5 brighter than the previous magnitude. If you want to compare magnitude 4 to magnitude 6: - magnitude 5 is 2.5 times brighter than magnitude 6 - magnitude 4 is 2.5 times brighter than magnitude 5 - so, magnitude 4 will be 2.5*2.5 = 6.25 times brighter than magnitude 6

[@NikomaGrob]

Thanks! I understand it now, I appreciate your answer a lot :) @@betaorionis2164

[@mars-jr5uu]

Meoww

[@NikomaGrob]

@@betaorionis2164How has my answer disappeared? I thanked you almost instantly a month ago, well, thanks again!

[@Hhenryarero]

Star linked, Sun Moon????

[@Hhenryarero]

24 Star's let's do the calc?

[@Hhenryarero]

15 Months in a year???

[@StagnantMizu]

I can capture magnitude 13 stars with a normal dslr camera and an old 200mm lens.

[@Hhenryarero]

10 ,15 days

[@jaihinthabijith8799]

if me win election of chief minister i will put order that off all light to see milkey way galaxy

[@Hhenryarero]

Hippos and Comers

[@sadiarashid5546]

Well Venus is not a star

[@learnthesky]

No, Venus is not a star, but it looks like one in the sky. The same magnitude system that is used to describe the brightness of the stars is also used for the planets.

[@robertalexander4372]

Better off reading a book and trying to understand her explanation.

[@An_art_appreciator]

Could use some mathematics.