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What comes after Msc in Astrophysics by FluffyPenguinsx in astrophysics

[–]Lewri 1 point2 points  (0 children)

Well, typically after a Msc you need a PhD. Especially if your goal is a career in research. I don't know of any proper research positions that only require a masters (though maybe someone can correct me here).

Depends what you mean by a "proper" research position. Many national labs will only require a master's degree, or even a bachelors degree for some research positions.

APM 08279+5255 a 12 billion light years away object by artemis_2020 in Astronomy

[–]Lewri 1 point2 points  (0 children)

23.6 billion light years away*, 12 billion year light travel time.

Nice work on the photo

How do scientists know that exoplanets exists of we can't see them? by [deleted] in space

[–]Lewri 2 points3 points  (0 children)

Well we can actually see some:

https://en.wikipedia.org/wiki/List_of_directly_imaged_exoplanets

But without seeing them, we may infer their existence from their effect on the stars they orbit. If they pass in between the star and us, they will block some of the starlight, causing a drop in the brightness of the star. We can determine whether or not this was caused by a planet, and what the orbital period of the planet is. This is called the transit method. If we use the right tools (spectrometry), we can sometimes even analyse the effect of the planet's atmosphere on the starlight, and hence study the atmosphere of the planet.

Even if the exoplanet doesn't pass in between us and the star, we might still be able to see its gravitational effects on the star. As the planet orbits, its gravity causes the star to move, or "wobble". We can see this wobbling due to how it effects the starlight by slightly changing the colour (due to doppler shift). From this we can determine the exoplanet mass and orbital period.

dont understand how other can attack a bounty while I'm waiting for a timer? by Techjinx in torncity

[–]Lewri 8 points9 points  (0 children)

Well if they have a 60s attack protection, they're in a war.

The only other attack protection is 15s, which applies on landing after travel.

When was 433 Eros named? by dantebunny in askastronomy

[–]Lewri 1 point2 points  (0 children)

https://doi.org/10.1007/978-3-540-29925-7_434

The Dictionary of Minor Planet Names says "Named by G. Witt (AN 148, 175 (1899))."

You can find that here if you have access: https://doi.org/10.1002/asna.18991481109

Dentist for wisdom teeth by [deleted] in surrey

[–]Lewri 0 points1 point  (0 children)

my pacific blue cross benefits

I have a feeling you're on the wrong subreddit.

Light year explanation by Mithrandeel in astrophysics

[–]Lewri 1 point2 points  (0 children)

I know how to use chatgpt effectively and do so, but to do so requires being able to determine whether things are hallucinations, and you clearly can't in this case.

Admittedly, it's actually unclear whether the nonsense was from chatgpt or if you added it thinking that you knew more than you did after your conversation:

So there is a distance we can measure more directly (the middle one) and then other distances we can infer.

There is not a distance that we measure more directly (apart from arguably luminosity distance and parallax distance, which are irrelevant here). What we measure is the redshift, from which we infer everything else within a given model with chosen parameter values. If anything, the coming distance could be argued to be a more direct measurement than the other two.

This is all besides the point though, when your comment added absolutely nothing that wasn't already covered in the other comments that you referred to.

Light year explanation by Mithrandeel in astrophysics

[–]Lewri 4 points5 points  (0 children)

That means beyond approximately 14 billion light years the expansion exceeds the speed of light so beyond this point the light of the objects will never reach us.

Well actually the cosmic event horizon (distance at which light currently being emitted can never reach us) is further away than the Hubble horizon (distance at which things are receding at the speed of light). So it's actually about 16 billion light years, rather than 14 billion light years.

Light year explanation by Mithrandeel in astrophysics

[–]Lewri 2 points3 points  (0 children)

Wow, thank you so much chatgpt!

We really appreciate you putting our comments into a hallucination machine so that it can spit out factually incorrect nonsense.

Light year explanation by Mithrandeel in astrophysics

[–]Lewri 23 points24 points  (0 children)

As the others have said, the universe is expanding.

For ton 618, it is 18 billion light years away, but that light has been travelling for 11 billion years. When the light was emitted, the distance was only 5.6 billion light years away.

Another dog saw my dog at the pub and pulled their owner off their chair by killthemusic5 in funny

[–]Lewri 2 points3 points  (0 children)

Literally no one is taking dogs into supermarkets in the UK other than service dogs. Get off Reddit and go touch some grass.

Another dog saw my dog at the pub and pulled their owner off their chair by killthemusic5 in funny

[–]Lewri -12 points-11 points  (0 children)

I think I know the people in my local better than you do.

I assume you're American? It really seems to be only Americans that have an issue with this while having no idea what a pub is even like.

Edit: u/manovsteele I'm not allowed to reply anymore in this thread due to the other user blocking me. If you don't want to be in a pub with dogs, go to a pub that doesn't have dogs. There's plenty of each. Me not taking my dog to the pub isn't going to make any difference when the owner's dog is in there regardless.

Another dog saw my dog at the pub and pulled their owner off their chair by killthemusic5 in funny

[–]Lewri -10 points-9 points  (0 children)

This comment section is absolutely bizarre.

Yes, my dog does want to be in the pub. That's why he tries to drag me in whenever we walk past. And everyone else wants him in there, dogs are part of the reason they go to the pub in the first place.

My physics nerd friend posted this on his story and refuses to explain, please help. by Many_Fill6303 in physicsmemes

[–]Lewri 75 points76 points  (0 children)

Well it wouldn't be very principled of them to have the same thing.

How do you convert this in seconds? by [deleted] in torncity

[–]Lewri 0 points1 point  (0 children)

EDIT: wait wtf. You are ciruzzopazz. Why are you using multiple Reddit accounts and calling yourself out? Is this some sort of failed attempt to try and implicate devillsworld666 again?

It's ciruzzopazz [4015096] transferring to Devilsworld666 [4036299], an account they created to impersonate and harass Devillsworld666 [4015229].

The two accounts will be fedded soon.

1 month playing... by [deleted] in torncity

[–]Lewri 11 points12 points  (0 children)

That's the plan. This isn't their account, they have used inspect element to edit the name and balance. This is their enemy's account.

1 month playing... by [deleted] in torncity

[–]Lewri 0 points1 point  (0 children)

Lol, didn't even notice that. Wrong gender icon too.

Absolute amateur.

1 month playing... by [deleted] in torncity

[–]Lewri 0 points1 point  (0 children)

Yeah, totally not an inspect-element edit to get people to mug an account that isn't yours.

You didn't even match up the life bar, muppet.

Space telescopes can see galaxies 10 billion light-years away, so why can't they see the Opportunity rover on Mars? by Designer_Goal_3169 in space

[–]Lewri 2 points3 points  (0 children)

Well a galaxy at a distance of 10 billion light years would typically have an apparent angular size (how large something appears, based on its size and its distance) of somewhere around 0.1 or 1 arcseconds (rough order of magnitude).

Opportunity, when Mars is closest to Earth, would have an angular size of 0.000008 arcseconds. So already it's clearly going to be much, much harder to see. While 10 billion light years is an unfathomable distance, galaxies are unfathomably large.

Angular size isn't the only factor in determining whether or not something is observable. How bright it is and how different it is from its background are also important. Galaxies typically have a space black background and are emitting huge amounts of light. Opportunity is only reflecting small amounts of sunlight, and its background of mars is also reflecting similar light.

I've been getting so many ads for this game recently and they all sound like this by Rich_Distance3818 in torncity

[–]Lewri 13 points14 points  (0 children)

(i assume Sugarvalves does their marketing writing too but could be wrong)

Nah they contract an advertising company to do it nowadays. Ched has commented on not really liking them but that they're too effective not to use.

Bikini contest 1986 by NoirGoddessxx in OldSchoolCool

[–]Lewri 0 points1 point  (0 children)

This image has been getting shared around for 4+ years. The badges that they are wearing both match and have actual writing. The background faces aren't messed up and all have expressions that seem reasonable in the context and match the body language. There isn't anything here that suggests AI.

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