Question details

asked in:
guitar.heroine (Rank: Novice)

If you we were able to get to a star thousands of lightyears from earth and survive its extrememly high temperatures, looking down with a telescope would you be able to see dinosaurs because we are seeing the earth as is what years ago?

Please reply, dispute with physics!

supporters so far (last 10):

[Close window]
1

helpful

credits: 30
Asked in Dinosaur, Sun, Physics asked on: 03/02/2007 11:06am
closed on: 03/09/2007 11:06am

9 Answers

Reckless19

Rank: Bachelor (936) | Science (55), physics (18)

7 minutes after the question was opened (03/02/2007 11:12am)

1

If you were already at this distant star then I would say yes. If you set off now, by the time you get there, you would see the world as it is now.
It's the same with the Sun. If it exploded at this very second, we would not know until 8 or so minutes afterwards.

Rating:

helpful

Rated as good answer by:

supporters so far (last 10):

[Close window]
1

Rate as good answer

Number of comments:

0

Add your opinion

osbertonbowls

Rank: Professor (4,816) | Science (119), physics (64)

12 minutes after the question was opened (03/02/2007 11:17am)

2

A silly question really. Assuming you can travel at or near the speed of light you'd be history before you arrived at this distant star, so surviving the high temperatures there would be of little concern to you.
If you had been frozen and thawed out on arrival and had a telescope powerful enough to look back earthwards the reflected light reaching your retina would have been emitted a short time after you left the planet - and unless someone had re-generated a few dinosaurs from DNA sadly they will not be apparent.

Rating:

helpful

Rated as good answer by:

supporters so far (last 10):

[Close window]
1

Rate as good answer

Number of comments:

0

Add your opinion

rainchild

Rank: Bachelor (924) | Science (47), physics (8)

14 minutes after the question was opened (03/02/2007 11:19am)

3

Of course not. The light would be too bright for you to see anything at all, let alone a tiny planet that gives no light, let alone the creatures that live on it. I think you want to ask, could you go back in time by travelling to a star? Maybe if you travelled at thousands of times faster than the speed of light.

Rating:

helpful

Rated as good answer by:

supporters so far (last 10):

[Close window]
1

Rate as good answer

Number of comments:

0

Add your opinion

samantha16

Rank: Novice (37) | physics (5)

17 minutes after the question was opened (03/02/2007 11:22am)

4

i dont know, but even if they made some sorta speeding-spaceshuttle thing that could help u go that far out,i dont think that u could see dinosaurs, thats just the same as getting a telescope and looking from britain to america, u wouldnt see 6 hours back in time...although u might b able to in space..i dunno.:S

Rating:

helpful

Rated as good answer by:

supporters so far (last 10):

[Close window]
0

Rate as good answer

Number of comments:

0

Add your opinion

P-Kasso

Rank: Master (1,187) | Science (115), physics (7)

26 minutes after the question was opened (03/02/2007 11:31am)

5

It is feasible. But there is a big but:
If you were travelling faster than light, then yes.
But you'd need to be travelling extremely fast.
For example, even when you look at the Sun from the Earth you don't actually see it where it is - you only see it where it WAS eight minutes ago because that is how long light takes to travel the short distance from the Sun to Earth.
If you magnify the distance you'd need to travel to get to a far galaxy in order to see Dinosaurs lolling around (which would be about 115 to 140 million earth years ago) then the maths works out that it would take you a massive 3,942,2000 times longer to see Dinosaurs from space than to see even the Sun in its wrong place 8 minutes ago.
Take a good packed lunch - you'll need it on a trip like that.

from 8 Light Minutes away to the 140,000 Light Years away (if you want to want watch Pteradons doing wheelies in the air on Earth) then you have a major problem since 140,000 Light Years (to the Dinosaur Earth period)


Supplement from 03/02/2007 11:34am:

Please ignore the last 3 stray lines after my comment - that was just one answer I was cooking earlier - should have deleted it but I hit the submit button too soon.

Rating:

helpful

Rated as good answer by:

supporters so far (last 10):

[Close window]
0

Rate as good answer

Number of comments:

0

Add your opinion

Mid_73

Rank: Novice (133) | Science (56), physics (18)

32 minutes after the question was opened (03/02/2007 11:37am)

6

A couple of big problems with what you proposes

1: You'd have to work out how to travel faster than light- a LOT faster. If dinosaurs died out 65 millions years ago, you'd have to travel 65 million light years in a few years of normal time. Due to Einstein's theory of relativity, it's currently believed that this is physically impossible

2: The size of telescope you'd need to be able to resolve a dinosaur from a distance of 65 million light years would be fairly epic too. Whilst this might be physically possible, the engineering challenge of getting a telescope with enough magnification and sensitivity would defeat today's engineering. The distortion caused by the earth's atmosphere, and everything else in between might make it impossible too.

3: You wouldn't need to survive the high temperatures on a star, you could almost certainly find a planet to build your telescope on (although you might find that it might be necessarily bigger and heavier than the planet you built it on

However, one point is valid. Light that bounced upward of dino's back is still wiggling/hurtling (whatever light does) away from us at 186000 miles per second. Our first radio transmissions are now about 100 light years away, adverising our presence to hungry, carnivourous aliens with very sophisticated death-rays.

Rating:

helpful

Rated as good answer by:

supporters so far (last 10):

[Close window]
0

Rate as good answer

Number of comments:

0

Add your opinion

Aiming4777

Rank: Archimedes (9,411) | Science (372), physics (156)

32 minutes after the question was opened (03/02/2007 11:37am)

7

It's not a question of disputing physics. If you travelled at the speed of light, it would take you thousands of years to get there and you would arrive there at the same time as the light from planet Earth, so you would see events starting from the time that you left.

Travel at the speed of light is impossible so you wouldn't even get there that quickly. When you looked back you would be seeing light from the Earth thousands of years before but after you left.

If we ignore physics and say you could travel faster than the speed of light, you could look back and see light arriving from the past but, unless you want to dispute the physics, you can't travel that fast anyway.

Rating:

helpful

Rated as good answer by:

supporters so far (last 10):

[Close window]
0

Rate as good answer

Number of comments:

0

Add your opinion

Messerwisser

Rank: Nobel Prize Winner (6,217) | Science (653), physics (231), sun (17)

5 hours after the question was opened (03/02/2007 03:11pm)

8

If you happen to be on an air conditioned place in that solar system right now and have the required equipment – yes! But you would not be able to tell us on Tellus.

Rating:

helpful

Rated as good answer by:

supporters so far (last 10):

[Close window]
0

Rate as good answer

Number of comments:

1

1 Different opinion

agentju90

Rank: Novice (70) | Science (108), physics (15)

4 days after the question was opened (03/06/2007 01:35am)

9

take me please. i hate this planet. we're killing it. i'm female, 17 and pretty. i'm deaf too so i won't talk too much or yell at you lol.

Rating:

helpful

Rated as good answer by:

supporters so far (last 10):

[Close window]
2

Rate as good answer

Number of comments:

0

Add your opinion

This question has already been closed. You can write a different opinion to an answer or a comment to this thread.

  • Comments