Author Topic: "How far can your telescope see?"  (Read 386 times)

togoseera

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Re: "How far can your telescope see?"
« Reply #30 on: February 04, 2018, 01:41:36 PM »
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I get asked this a lot. The question comes in a few variations:

"You have a big telescope. It must be able to see very far."

"How far can your telescope see?"

"If I got a telescope, would it be able to see as far as yours?"I've not yet found a good, non-technical answer. How do you respond?

Billions of light years into the past is what I think. Some of the distant stars we observe most likely do not even exist anymore...

The theoretical limit of seeing of my scope is 15.1 magnitude, though due to weather and atmosphere, in practice it is less. Pluto is 15.1mag.

Resolution of detail on the Moon is about 1.1 miles.

There you have it...no clear answer, at least, not without math..lots of math...and really really big numbers....

viogreetnifi

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Re: "How far can your telescope see?"
« Reply #31 on: February 08, 2018, 09:09:41 PM »
You're a magnitude too high when it comes to Pluto's brightness, which is currently magnitude +14.1.

Dave Mitsky

Cesar Rojas

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Re: "How far can your telescope see?"
« Reply #32 on: February 09, 2018, 01:58:45 AM »
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You're a magnitude too high when it comes to Pluto's brightness, which is currently magnitude +14.1.

Dave Mitsky

I didn't do the math...That was from a Google search....Who was it that said don't believe everything you see on the internet... Abe Lincoln, right?