100 light years away.

So if we were on that planet and looking at earth with a super powerful telescope, we’d be looking at the roaring 20s. I think. Science is hard.

[removed]

Can we get working on light speed travel so we can wreck that one too? 😆🤕

[removed]

Both exhilarating and spooky.

And if we then got on a spaceship that travels at the speed of light and set out to go check out Earth, we wouldn’t show up until 200 years after the events witnessed through the telescope.

[removed]

[removed]

[removed]

A Mars colony is a bad idea

Let’s send some 6 year olds with guns to really confuse them.

We don't deserve to infect another world.

But when we arrive we wouldn't have significantly aged at all.

[removed]

[removed]

[removed]

We need food and water + energy+ home

[removed]

You would be a terrible Tyranid with that attitude /s

Nestle already has “dibs” on any water there..

Plan(et) B is not reachable by humankind. Save Plan(et) A first, Earth.

So in about 25 years, if this planet studies earth, it might start observing nuclear explosions on our planet.

We do, but Elon or Mark don't. Heartles robots are fine in the athmosphere on Mars.

So this isn’t actually true, we could reach it with the correct technology in a single lifetime.

"correct technology". good luck with that, and with people on board.

Special Relativity implies that you could reach a star 100 light years away in less than 100 years. It’s actually pretty interesting.

I think we would be great Orks though.

[removed]

[removed]

No it doesn’t? I’m curious how you came to that conclusion.

This is relative to the traveler, not from earth. The closer you get to the speed of light, the faster you move through time itself.

I'm excited to see us finding more planets in the goldilocks zone in the Universe.

As many stars are out there in the Universe, we can't be just the lucky ones to have this nice neighborhood that we live in.

There is no Planet B. Open your eyes and see!

I see what you mean, I was incorrect. Thanks for clarifying.

What if we use a high power telescope to look at this other earth and see what their roaring 20’s are like?

[removed]

fuck.......you think we can delete the images before they open them?

Time to deliver some good old fashioned American liberty.

[removed]

Basically light is a time machine in a way, or maybe a time capsule.

/r/showerthoughts

If you rode a spaceship a light speed for 100 years. Wouldn't you age 100 years?

E: If you were then to look back at earth. It would appear as if nothing had changed at all.

At or near light speed, time dilation becomes a factor, so it would take 100 years to an observer but to the people in the ship, it would seem like a lot less time.

The faster you travel, the more time dilates. At the speed of light, time does not move at all.

From an outside observers perspective it would take 100 years. For anyone on the ship it would be instantaneous, if you assume no acceleration or deceleration period.

But if you were on the ship, it would still be 100 years is my point.

No, to you on the ship, you'd just teleport instantly. Or at slightly below the speed of light, it'd still be a lot quicker than 100 years.

>it would still be 100 years is my point

To an observer on earth. But not to you on the ship. If you had a telescope on a ship travelling towards earth near the speed of light, it may feel like a day to you (depending on speed), and if you looked at Earth through the telescope, it would look like Earth was going in fast-forward so fast that 100 years only takes one day.

But before that, they'll see The Olympic Games in Berlin, hosted by Hitler.

https://youtu.be/w-Ngqhe3y-Y

[removed]

[deleted]

With the focus on “planet in inhabitable zone” I have an inkling that we might be the baddies when we solve the travel part.

I want to see a high resolution photo of a exoplanet in the habitable zone. I wonder if NASA is working on that

Good exercise, but Red Dwarfs aren't great stars to live near.

• They're unstable, ejecting radioactive crap all the time.

• The habitable zone is very close to the star - like Mercury close - exposing you to the aforementioned crap

• Planets around these stars are likely 'tidally locked', meaning one side is always getting baked. Life would need to 'hide' in places like the light-darkness line or the poles.

But, the search and find are a good exercise.

No, from your point of view it would be instant.

So… how would you pilot the ship or address any issues that come up, like repairs?

In this scenario the ship is moving at the speed of light so it is not experiencing time, just like the people inside it.

It cannot breakdown while moving at lightspeed, because no time can pass to allow failures to occur.

But matter can't actually go the speed of light, only energy can, so this is all just a fun thought exercise.

I feel like the big thing with colonizing space is that if we can reach another planet and sustain a colony there, we could make a space colony and save ourselves the troubles of dealing with landing on a planet.

[removed]

[removed]

That’s a long to say you’re speculating 😂

Edit: yes, I’m specifically referring to your speculating on matter going the speed of light, and yes I’m still laughing.

Time dilation as you approach the speed of light is not speculation, it's fact. Time slows down heavily the closer you approach lightspeed and does not pass at all for anything that can actually reach it.

Any discussion of matter going the speed of light is speculation, because it is impossible in our current understanding of physics.

Hold up champ. We don’t know whether they have mineral resources yet.

If you traveled at the speed of light, you would need to not have any mass. If you were to travel near the speed of light (e.g. 99.9% the speed of light), to you about 4.5 years would have passed. To everyone else, 100 years would have passed.

Here is a nice calculator:

https://www.omnicalculator.com/physics/time-dilation

So at 90% of the speed of light how does one do repairs?

I could use an extra limb though, since I can shitpost faster with three hands instead of two.

Prep the rocket and cryo chambers Jeffy boy.

In theory, exactly the same as any other spaceship.

Anyone attempting repairs is operating in the same inertial reference as the ship, so from their perspective it's no different from repairing a ship at any other speed.

But by the time they make the repair couldn't they have arrived?

Yes. Depending on the strength of the time dilation, a repair may not be possible to complete before the journey is over.

But anyone capable of getting a ship near lightspeed would also have the physics and math knowledge necessary to calculate their level of time dilation, so they could make logical decisions regarding necessary repairs.

[removed]

Well that's true but they probably definitely have a few WMD's.

And if in 20 years or so they keep looking they will see flashes from all the nukes being used lol

[removed]

[removed]

*U. S. Has entered the chat... *

[removed]

We should name it Romulus, and the first planet Remus.

[removed]

The hard part comes when you want to stop lol

Serious question.

How long do you think it will be before humans attempt to colonize a new planet or moon?

Do you think it will begin within our lifetime?

My grandpa used to always say, "it ain't the fall that kills you, it's that sudden stop at the end that gets you..." Imagine how long it would take to safely decelerate from near lightspeed.

[removed]

[removed]

The next generation of telescopes on the drawing board is to be able to detect them via direct imaging. Think 2030's.

For actually seeing details like continents and clouds in a picture, you'd need a probe (20 years minimum) or a telescope at 100 times the Earth-Sun distance that uses the Sun's gravitational lensing to turn it into a massive telescope.

Mars, yes in our lifetime.

An exoplanet, i.e., another star system? At least 50 years off. At least. Just to launch it, and decades to get there.

That’s depressing, but thanks for the infos.