Gravitational Lensing: What It Is And How It Is Helping Us Discover New Galaxies

Gravitational lensing occurs when a huge amount of matter, like a star, galaxy, or cluster of galaxies, creates a powerful gravitational field around it, strong enough to bend the light coming from distant galaxies (behind them). Roots of gravitational lensing lie in Einstein theory of relativity which states that massive bodies warp the space around it. Thereby the light passing through this warped space curves near massive celestial bodies. Depending upon the position of emitting, lensing and observing body, gravitational lensing may distort, magnify or lead to multiple occurrences of the same object in different places.

Leveraging the concept of gravitational lensing, a technique called microlensing is developed which is helping us in discovering new galaxies and dark matter. Einstein ring is a beautiful phenomena observed using microlensing which we have illustrated in this video using animations. Thus, Einstein's ground-breaking work on general relativity in 1915 has paved the way for astronomers to continue studying the very structure of the Universe leveraging the power of gravity!

Table of Contents:
Introduction- 0:00
Gravitational lensing- 1:13
Einstein ring- 3:59
Dark matter- 4:35
Conclusion- 5:30

#science #animation #gravitationallensing

References:

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[vinitha]

wow such an easy explanation to understand! Thank you!

[lightlabetc]

Love your graphics and way of teaching this subject.

[smkser]

Here after the first Deep Field released by James Webb!

[adityaprakashsingh]

Thanks a lot for simplifying it!☺️☺️☺️☺️☺️😊🙏🙂

[pokeynewsome]

Can anyone tell me when we were first able to view gravitational lensing?

[godspeed_]

Einstein’s hoodie was really cool to see as a physics nerd

[ashwiniravi]

This is very helpful I tell my kids to watch u

[ashwiniravi]

Nice this is very helpful I have seubbed to your channel by 20 accounts

[fredbloke]

So light is attracted to mass even though it has no mass itself, likewise light produces an equal and opposite
force on that mass so also creates gravity?

[MP-yehr]

Sometime it feels, this space is a science project of an alien

[tomusic]

1:27 why doe the light bend away from the gravity and not towards? 🤷

[kokfahchong]

In regarding gravitational lensing, a massive galaxy that is standing in between a distant star and the observer is obstructing most of the light of the star making it impossible to look clearly. Gravitational lensing is definitely not something rosy at all.
Einstein's general theory of relativity is wrong because the age of the universe (30 BYs) is younger than the size of the still expanding universe (93 BYs) which implies that celestial bodies were travelling much faster than the speed of light in the past but somehow they have slowed down slow enough now for the light of the past to catch up with us that enable us to see the past of the universe. Thus, speed of light is not the limit. Thing can actually travel faster than speed of light. Sky's the limit.
In God I trust.

[corbinplaz]

I deadass looked up how lotion worked and scrolled and saw the link to this video

[AETruenoBurr]

Einstein General theory of relativity predicts Gravitational lensing not Newton

[ashwiniravi]

Pls give him a shout out he started a yt channel watching u and trying to do gaming

[aneklomps]

Consider adding some POC characters in future videos. This info is important and interesting for more than just white folks.

[mapu]

Ooof this is some outdated information.

[christopherphillipskeates]

can worm holes carry gravity to polerise gravitational lensing in a long line so we can detect them if they exist ... skeatesybubbygoddess2022