Naked Science Forum

Non Life Sciences => Physics, Astronomy & Cosmology => Topic started by: neilep on 09/07/2008 21:57:48

Title: How Much Time Is Saved When Looked At Stars Through Hubble ?
Post by: neilep on 09/07/2008 21:57:48
Dearest All,

Hugs ya !!


Here's a telescope in space called Hubble !

 [ Invalid Attachment ]

Nice eh ?....being delivered next Tuesday !


Say Hubble checks out what's happening on a nearby star....say Aplha Centuari !

How many years does it knock off when viewed at like this ?

Do you know what I mean ?

We see  things on Earth with our eyes that the light has taken many years to reach....but if we take a closer look through a telescope are we seeing it a few years earlier ?....

I've got this all wrong haven't I ?......cos I'm confusing just zooming in with actually being nearer the star yes ?

Oh...bother !!


Hugs anyway



Neil
Star Botherer

xxxxxxxxxxxxxxxxxxxxxx







Title: Re: How Much Time Is Saved When Looked At Stars Through Hubble ?
Post by: RD on 09/07/2008 22:12:00
It takes light about 1.3 seconds to travel from the moon to the Earth.
So when you (on Earth) look at the moon you are seeing it as it was 1.3 seconds ago.
This is true whether you use the naked eye, or look at it through a telescope.
Title: How Much Time Is Saved When Looked At Sras Through Hubble ?
Post by: turnipsock on 09/07/2008 23:07:39
How long does it take the Hubble to transmit the image to earth?
Title: How Much Time Is Saved When Looked At Sras Through Hubble ?
Post by: RD on 09/07/2008 23:27:16
Quote from: turnipsock on 09/07/2008 23:07:39
How long does it take the Hubble to transmit the image to earth?

Approximately two milliseconds: it is only 600Km above surface of the Earth.
Title: How Much Time Is Saved When Looked At Stars Through Hubble ?
Post by: Bored chemist on 10/07/2008 19:03:01
Then add an hour or so for the data to get through the virus scan ;-)
Title: How Much Time Is Saved When Looked At Stars Through Hubble ?
Post by: blakestyger on 10/07/2008 19:40:50
Why has it only got one wheel?
Title: How Much Time Is Saved When Looked At Stars Through Hubble ?
Post by: DoctorBeaver on 10/07/2008 20:39:57
Quote from: blakestyger on 10/07/2008 19:40:50
Why has it only got one wheel?

A Scouser nicked the other 3  [:D]
Title: How Much Time Is Saved When Looked At Stars Through Hubble ?
Post by: neilep on 10/07/2008 20:54:06
Are ewe sure it's a wheel ?

I think it's because Hubble has subscribed to Sky +




Thank ewe all for your answers !!