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/sci/ - Science & Math

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15468015 No.15468015 [Reply] [Original]

why is a black hole not just a star that sucks in light? They have the same properties as a star except they don't output light only heat.

>> No.15468017

fine, but you need to justify why it only absorbs light.

>> No.15468020

>>15468017
Escape velocity is > c, although this may imply gravity can move faster than c

>> No.15468022

>>15468020
absorption or emission doesn't have anything to do with escape velocity, try again. of course, the conventional understanding of black holes involves escape velocity, but i doubt that's what you want to argue

>> No.15468027

>>15468022
>The radius at which a mass has an escape velocity equal to the speed of light is called the Schwarzschild radius. Any object that is smaller than its Schwarzschild radius is a black hole – in other words, anything with an escape velocity greater than the speed of light is a black hole.[0]

[0] nasa.gov

>> No.15468201

>>15468015
We have no information about the inside of a BH so we can't tell if it fits the description of a star (what's your definition of a star? fusion process?).
And why do you think it outputs heat? I don't think it does.

>> No.15468205

>>15468201
>we
>who
>Have no information
>Therefore it can't be done

Fucking midwit

>> No.15468207

>>15468205
>tripfag opinion

>> No.15468211

>>15468207
>Jelly

T4SDY

>this thread

>> No.15468250

>>15468015
>they don't output light only heat
what do you think heat is?

>> No.15468251

>>15468015
>why is a black hole not just a star that sucks in light?
A star produces light via a nuclear reaction. A black hole absorbs light via gravity. The mechanisms are not comparable.

>> No.15468261

>>15468027
yes, that's because nasa is talking about the conventional understanding of a black hole. which is what op is rejecting.. while simultaneously accepting. i can't tell anymore.

>> No.15469113

what is it about black holes that makes them the number one most popular popsci topic of discussion amongst the brainlet soience fangoys?
is it the comic bookish aspects of the spectacular, unrealistic and completely non disprovable conjectures which go along with the topic that make black holes so popular amongst the scientist posers and wannabes?

>> No.15470327

>>15469113
Stop spamming your own pasta

>> No.15470358

>star
>light

Light is a product of the mind

>> No.15470370

Awghhh...

You'll get there fren

This is important (i.e. serious).

You must move on from past that troubles you to proceed. Otherwise you'll stagnate.

>> No.15470382
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15470382

>>15470358
(You)'ll need these.

>> No.15470384

The sun is a presence with X signal and you're either connected, pinging or not.

>> No.15470387
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15470387

DOOPID

>> No.15470769

>>15468015
Black holes and stars are fundamentally different entities with distinct properties, although they are both celestial objects and part of the life cycle of massive stars.

A star, such as our sun, is a massive, luminous sphere of plasma held together by its own gravity. Stars generate their energy through nuclear fusion, specifically the fusion of hydrogen atoms into helium in their core. This fusion process releases a tremendous amount of energy in the form of light and heat. Stars shine because they are emitting the light produced by these nuclear reactions.

A black hole, on the other hand, is a region of spacetime exhibiting gravitational acceleration so strong that nothing—no particles or even electromagnetic radiation such as light—can escape from it. Black holes are formed from the remnants of massive stars after they exhaust their nuclear fuel and undergo a supernova explosion.

The "black" in black hole comes from the fact that, because no light can escape the intense gravitational pull, they are not directly visible. They do not emit light or heat in the same way stars do. However, some black holes can be detected indirectly. For instance, matter falling into a black hole often forms an accretion disk around the black hole and emits X-rays, which can be detected. Also, the strong gravity of black holes can bend the path of light from distant stars, a phenomenon known as gravitational lensing.

In terms of why a black hole isn't just a star that "sucks in light," it's because black holes and stars have different mechanisms driving their behaviors. A star's gravity does pull things toward it (like light), but the light produced in the star's core can escape the star's surface because the gravitational pull at the surface isn't strong enough to prevent it. In contrast, the gravity of a black hole is so strong that nothing can escape once it passes the event horizon, not even light, which is why it appears black.

>> No.15470771

>>15468015
fake image