Posted by admin | Posted in Uncategorized | Posted on 26-02-2006
Tags: astronomy, news, science, space, stars
System Star Gazing
Seeing our Galaxy in the past?
We see the relatively close moon as it was 1.2 seconds ago and the more distant sun as it was about 8 minutes ago. These measurements—1.2 light-seconds and 8 light-minutes—can be thought to describe both time and distance.
The distance to more remote objects such as other stars is so great it is measured in light-years—the distance light will travel in a year, or about 6 trillion miles (10 trillion kilometers).. Even the nearest star system, Proxima Centauri, lies more than four light-years away, so it appears to us on Earth as it was just over four years ago when the light began its journey.
In this way, light's finite speed gives us a valuable view into the past, and as we strain our gaze deeper into the universe we look further back in time.
SO MY QUESTION IS... IS SOMETHING WE ARE LOOKING AT WITH TELESCOPES OUR OWN GALAXY IN THE PAST???? THAT WOULD BE COOL.
Yup, when you look in the center of our Galaxy you are looking back millions of years..coined the term light year, if the center of our galaxy is a 15 million light years away it would be 15 miilion years ago...
The coolest thing I have heard about all galaxy's is: there are black holes at the center of all galaxies including the milkyway..
I could talk about this for hours...
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73 Classic Good News Old Time Radio Broadcasts on DVD (over 70 hours 46 minutes running time)
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DescriptionAstronomy For Dummies |
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Star gazing