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The Walrus
Jul 9, 2002




talk abbout all the HOTTEST stars here, the sexiest and the uggos, the up and comers and the old burnouts that are gonna implode under their own mass. stars are neat - and get this, you are made of them.

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karmicknight
Aug 21, 2011


EEEEEEEY YO

* The Sun is a Miasma of Incandescent Plasma.

pmchem
Jan 21, 2010




, a gigantic nuclear furnace

Lawman 0
Aug 17, 2010





The sun is actually a pretty bright star.

hbag
Feb 13, 2021

piss off



Lawman 0 posted:

The sun is actually a pretty bright star.

i disagree, i looked directly at it and i can't see a loving thing

Flavius Aetass
Mar 30, 2011

This avatar should not be read as endorsing any violence against women, only the destruction of the United States of America.


hbag posted:

i disagree, i looked directly at it and i can't see a loving thing

wow modern day presidential

Phanatic
Mar 13, 2007

Please don't forget that I am an extremely racist idiot who also has terrible opinions about the Culture series.


hbag posted:

i disagree, i looked directly at it and i can't see a loving thing

Maybe some binoculars would help?

Skeleton Ape
Dec 21, 2008



Eta carinae is a good star, it's what happens when you ask "how big can a star get, really?" One of the things that happens is its atmosphere says gently caress you gravity, I do what I want

Base Emitter
Apr 1, 2012

?


Every time I hear about Eta Carinae or Betelguese or one of those other fat old fucks I just want to know when its going to blow itself to hell.

Wanna see a supernova.

Flavius Aetass
Mar 30, 2011

This avatar should not be read as endorsing any violence against women, only the destruction of the United States of America.


it it true that there are some stars that are shooting tremendous amounts of energy out of their poles and the energy travels so far it is possible we could one day be wiped out by a star's laser beam?

Phanatic
Mar 13, 2007

Please don't forget that I am an extremely racist idiot who also has terrible opinions about the Culture series.


Flavius Aetass posted:

it it true that there are some stars that are shooting tremendous amounts of energy out of their poles

Not normal stars, you only get beaming like that from compact objects like neutron stars. That's what pulsars are: we're picking up the electromagnetic radiation being beamed out of the magnetic poles of neutron stars, and as they rotate we observe the pulses as the beam sweeps over us.

quote:

and the energy travels so far it is possible we could one day be wiped out by a star's laser beam?

You might be thinking of gamma-ray bursts, which aren't a steady-state phenomenon and instead come (probably) from the collapse of certain types of stars into a black hole, or the disruption of those stars by a black hole. If one occurred within several thousand light years of Earth, with the beam pointed to hit Earth, then you could get effects on life (not wiping it all out, though), but a GRB has never been observed in our galaxy and it's not even known if they're possible in the Milky Way's stellar population.

Eat My Ghastly Ass
Jul 23, 2007



the sun is a giant piece of poo poo

low key sex master
May 27, 2004





Ughh give me that Betelgeuse explosion baby I'm almost there

bradzilla
Oct 15, 2004

It's mysterious what attracts you to a post...


Skeleton Ape posted:

Eta carinae is a good star, it's what happens when you ask "how big can a star get, really?" One of the things that happens is its atmosphere says gently caress you gravity, I do what I want



big balls, tiny dick

Ajaxify
May 5, 2009


Eta Carinae is cool. It's actually a binary star system, and what you're seeing is the Homunculus nebula surrounding the system. The nebula was created very recently (in astronomical terms) in the 19th century during an event called "the great eruption" where one of the stars in the system, a blue supergiant, underwent an almost-supernova. In 1843, Eta Carinae was the second brightest star in the night sky, and would stay that way for 18 years before fading from view.

https://www.youtube.com/watch?v=s4q68iis1p0

Salt Fish
Sep 11, 2003



Cybernetic Crumb

What we call the "surface" of the sun is just where the mean free path of escaping photons is long enough to reach us. The mean free path is the average distance a photon can travel before being absorbed, so inside the sun they go a centimeter, get absorbed, get emitted, go 1 more cm, get absorbed, etc. Eventually this becomes long enough that the photon makes it to our eyes, and that part of the sun, where the density is just right to allow this, is what we call the surface.

The thing is that this mean free path is different for different wavelengths of light, and the sun emits a full spectrum. This means that the "surface" of the sun is at a different radius if you look at blue light compared to red light, compared to xrays, compared to radio waves.

You can make an argument that we live inside the sun depending on how you define its size.

Fluffdaddy
Jan 3, 2009


As the great scientists Smash Mouth once said, we might as well be walking on the sun.

mediaphage
Mar 22, 2007

Excuse me, pardon me, sheer perfection coming through


przybylski’s star is my favourite weirdo

https://en.wikipedia.org/wiki/Przybylski%27s_Star

Sad King Billy
Jan 27, 2006

Thats three of ours innit...to one of yours. You know mate I really think we ought to even up the average!

Base Emitter posted:

Every time I hear about Eta Carinae or Betelguese or one of those other fat old fucks I just want to know when its going to blow itself to hell.

Wanna see a supernova.

Actually, they are younglings.

Poopelyse
Jan 21, 2011

Set phasers to maximum stunning



mediaphage posted:

przybylski’s star is my favourite weirdo

https://en.wikipedia.org/wiki/Przybylski%27s_Star

some other weirdo and/or cool stars

Tabby's Star aka the alien megastructure star
https://en.wikipedia.org/wiki/Tabby%27s_Star

SGR 1806-20 - a magnetar 50,000 light years away that had a starquake which "released more energy in one-tenth of a second than the Sun releases in 150,000 years." this ionized the earth's atmosphere and even blinded the Swift telescope.
https://en.wikipedia.org/wiki/SGR_1806%E2%88%9220

TYC 7037-89-1 - a triple binary star system (sextuple system) recently discovered by TESS


https://exoplanets.nasa.gov/news/1672/discovery-alert-first-six-star-system-where-all-six-stars-undergo-eclipses/

George
Nov 27, 2004

No love for your made-up things.


hot young stars

Salt Fish
Sep 11, 2003



Cybernetic Crumb

Stars have a pretty narrow range of mass. They can be .1 solar masses up to about 300 solar masses, or 10^29 kg up to 10^32kg. Anything outside of this range is too small to fuse hydrogen or too big and it can't keep all the gas in.

Stars have an enormous range of sizes. This is because a star's radius depends on the mass to the 4th power, and a star can have a volume that is a billion times more than the sun. A little bit of mass makes a big difference for the radius of the star.

Skeleton Ape
Dec 21, 2008



Phanatic posted:

Not normal stars, you only get beaming like that from compact objects like neutron stars. That's what pulsars are: we're picking up the electromagnetic radiation being beamed out of the magnetic poles of neutron stars, and as they rotate we observe the pulses as the beam sweeps over us.

Pulsars are nuts. Something the size of a city spinning at 10s to 1000s of RPM, and it weighs as much as a star. Here's the Crab




low key sex master
May 27, 2004





George posted:

hot young stars

Nubile neighborhood nebulae just want to BLOW! click here to find the hotties in your local galactic cluster

low key sex master
May 27, 2004





Aaaaa double post sorry

Lawman 0
Aug 17, 2010





George posted:

hot young stars

speaking of
https://twitter.com/BadAstronomer/status/1364611587001241600

actionjackson
Jan 12, 2003

my posts look like shit

fuckkkkkkkkkkkk

Only registered members can see post attachments!

Shwoo
Jul 21, 2011



VY Canis Majoris isn't even considered the largest known star anymore. According to Wikipedia, it's currently Stephenson 2-18, which is wider than the orbit of Saturn.

Lawman 0
Aug 17, 2010





https://twitter.com/galaxy_map/status/1364937825884524545

vortmax
Sep 24, 2008


vorticity (n):
A measure of the local rotation in a fluid flow. In weather analysis and forecasting, it usually refers to the vertical component of rotation and is used most often in reference to synoptic scale or mesoscale weather systems.


Pillbug

karmicknight posted:

* The Sun is a Miasma of Incandescent Plasma.
https://www.youtube.com/watch?v=sLkGSV9WDMA

Shwoo
Jul 21, 2011



This video about star sizes is a little out of date, but still pretty cool.

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Toys For Ass Bum
Feb 1, 2015



I love how everyone thinks the sun is yellow, because like 99% of the time you see it is in the early morning/late afternoon when it's close to the horizon and the light is being scattered harder.

It's actually white:

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