What Is Astrophysics Explained

Astronomers began to make use of two new techniques—spectroscopy and photography. 
We can say that was likely the birth of Astrophysics.
But what' s spectroscopy? And what's exactly astrophysics?
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Astrophysics is a science that uses methods and principles, or we could say THE POWER of physics with the aim of studying astronomical objects and phenomena.
Of course, among the subjects studied are the Sun, other stars, and galaxies.
But astrophysics also studies extrasolar planets, the interstellar medium, and the cosmic microwave background.
Astrophysics is a very broad subject, and it applies concepts and methods from many disciplines of physics, including classical mechanics, electromagnetism, statistical mechanics, thermodynamics, quantum mechanics, relativity, nuclear and particle physics, and atomic and molecular physics. 
We said that astrophysicists study the spectrum of celestial objects. But what exactly is a spectrum? 
When a black body is at a uniform temperature, its emission has a characteristic frequency distribution that depends on the temperature. Its emission is called black-body radiation.
In 1900, Max Planck derived a formula for the observed spectrum of a black body.
The Planckian function is a function of only the frequency of the radiation and the body's temperature.
A typical Planckian function looks like this:
What's Spectroscopy?

Spectroscopy is the study of the interaction between matter and electromagnetic radiation as a function of the wavelength or frequency of the radiation.
In fact, spectroscopy provides us with positions of stars and gas clouds (for example, with the help of spectroscopy we can understand better the spatial distribution of star in our galaxy!)
Also, using the so-called virial theorem
Redshift and blueshift describe how light shifts toward shorter or longer wavelengths as objects in space (such as stars or galaxies) move closer or farther away from us.

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Credits: Ron Miller
Credits: Nasa/Shutterstock/Storyblocks/Elon Musk/SpaceX/ESA/ESO
Credits: Flickr

Video Chapters:
00:00 Introduction
01:14 What is Astrophysics
05:40 What is Spectroscooy

#insanecuriosity #astrophysics #spectroscopy

[InsaneCuriosity]

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[insanecuriosity]

A short lesson in astrophysics. Are you in love with Astrophysics? Is there anything more you want to hear?

[horizonbrave]

Never let it be said that humans will not hunt how to research things better... I really wish I could have done better in school to go for something heady like Astrophysics.. but with my math, I'd have been laughed out of school. I can only sit from the side lines and look on in amazement and cheerlead. The subject and the power of it to me is almost nigh magic

[horizonbrave]

Oh and by the by...a video with perhaps the top 10 (it's youtube after all) most ground breaking astrophysics 'discoveries' or findings that shaped our current knowledge would be interesting!

[CryptoChronix]

Pov: me watching this like I understand a single thing

[ellaandaustin]

Great overview of Astrophysics! You were able to give a general overview(that people of the general public can understand) in just 12 minutes! Love it!

[ATVProven]

I love your content, this is my favorite YouTube channel. I always look forward to watching the newest video when I get the notifications. Keep it up 👍

[josephjohnson]

I really want to work in astrophysics or Astronomy when I’m older but I don’t want to go all threw college just for me to be in the bottom 20% of astronomers and make 39 grand a year

[tecnicaladitya]

Thanks for explaining astrophysics
, I want to be a astronomer and I also like astrophysics

[melissasalasblair]

Thanks for going back to the future in the subject, Reviews are always a good thing for everyone even those that think everything is known. As If lol

[brucea]

A good explanation of astrophysics. My only quibble is that a few times near the end of the video you misused the term "astrological" for the correct "astronomical". Astronomers get very upset when people confuse the superstition of astrology with the science of astronomy.

[emmalove]

The only thing that I would ask is during explanations any and all formulas mentioned be shown in example,

[VanNguyen-kxgx]

I like to know astrology and astronomy too.

[justmenonya]

This is awesome i do love it but i can plainly hear that astrophysicists pretty much speculate their findings because its very possible that we dont have equipment powerful enough to see all light in the spectrum.. wow.. you did do a wonderful job with this explanation I totally understood this!

[speedingwrithe]

What if there is an exo-planet below absolute zero? How will we discover it? I know it seems like a dream or an impossible thing, but any thing can happen in astrophysics right?

[MG-erdm]

With so much to know we're always ahead of the game with lnsane Curiosity at the fore! ❤

[Useruser]

I hate this and I fucking love it at the same time lmao

[benmeyers]

So it is safe to say that our Universe is definitely not colorblind. Hmm, could make for some interesting talk around the ole "water cooler!"

[cowboyneverdycowboynevercr]

Science is one of my interests, astrophysics being one of them, categorically.

The many things l wonder myself, like,
*) are the stars that are closest, on average, 4 light years apart?
*) which two stars are an example of how far our Sun is to the nearest star?
*) What two stars can we point to look and say, that star and that star are 4 light years apart, as we are to the nearest star? 😀😉👍🏼

[Virtualmassslave]

can dark matter be a techno signature? that scary fast growing?