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Telescopes
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XMM Xray MultiMirror telescope

Slide 25

Types of telescopes

Types of telescopes

Radio telescopes

Millimeter telescopes

Sub-millimeter telescopes

Infrared telescope

Optical telescopes

Ultraviolet telescopes

X-ray telescopes

Gamma ray telescopes

Slide 26

The telescopes look very different!

The telescopes look very different!

CGRO Compton Gamma Ray Observatory

Slide 27

AndÖ

AndÖ

the images from the different types of telescopes look very different!

Slide 28

The images look very different

The images look very different

Ultraviolet

Visible

Infrared

NGC1512

barred spiral

galaxy

HST images

Slide 29

The images look very different

The images look very different

M87 giant elliptical galaxy in Virgo cluster

Slide 30

The images look very different

The images look very different

Cygnus A

X-ray (Chandra)

Radio

Slide 31

The images look very different

The images look very different

red=xray

green=optical

blue=UV

30 Doradus

Open cluster

in LMC

Slide 32

Types of EM radiation

Types of EM radiation

Why do the telescopes and images look so different?

Slide 33

Types of EM radiation

Types of EM radiation

The difference between each type of EM radiation in each region is its

energy!

Slide 34

Types of EM radiation

Types of EM radiation

Because of their different energies, each type of EM radiation interacts differently with matter.

Thatís why the telescopes look so different.

Thatís why the images look so different.

And thatís also why the telescopes are located at very different places .

Slide 35

Types of EM radiation

Types of EM radiation

The energy (or freq or wavelength) determines how the radiation will react with the atmosphere.

Slide 36

Atmospheric windows

Atmospheric windows

Radio,

millimeter,

sub-millimeter

Infrared and

optical

Ultraviolet

xrays, gamma rays

Water and CO2

Ozone and oxygen

Slide 37

Location of radio, millimeter, and sub-millimeter telescopes

Location of radio, millimeter, and sub-millimeter telescopes

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