gcsescience.com                                       49                                       gcsescience.com

Stars and the Universe

Other Telescopes.

Modern telescopes do not just collect light waves.
Stars emit electromagnetic waves of all types,
information from the whole of the electromagnetic spectrum
is collected by different telescopes operating in different regions.
Some of these are listed below.

Name of Telescope Place of Telescope Region of Electromagnetic Spectrum
Lovell Cheshire (UK) Radio Wave
SPT Antarctica (South Pole) Microwave
Spitzer Space Infra-red
Hubble Space Visible
FUSE Space Ultraviolet
XMM Newton Space X-Ray
Hess Space Gamma rays

The place where the telescope is situated needs to be carefully chosen.
Gamma rays and X-rays are absorbed by the Earth's atmosphere
and do not reach the Earth's surface.
Telescopes receiving Gamma rays and X-rays  must be in space.

Other regions of the electromagnetic spectrum
are also affected by the Earth's atmosphere.

The Hubble telescope is in space because
it receives clearer images outside of the Earth's atmosphere
than other visible light telescopes on the Earth's surface.
The image at the Earth's surface can be blurred
(by dust and pollution in the atmosphere)
and less distinct because of other sources of light
from street lights, towns and cities (called light pollution).

The SPT (South Pole Telescope) is in Antarctica which is very dry
(and cold) because it receives microwaves which would
be absorbed by water molecules in the Earth's atmosphere.

The information gained by modern telescopes have helped our
understanding of what the Universe is, and what it is made from.
Improvements in the magnification of telescopes
have led to new stars and galaxies being seen for the first time.
Also objects in the Universe which can not be seen
with visible light can now be detected.

back    Links    Universe    The Solar System    Revision Questions    next

gcsescience.com       Physics Quiz       Index       Solar System Quiz       gcsescience.com

Home      GCSE Chemistry      GCSE Physics

Copyright © 2015 gcsescience.com. All Rights Reserved.