Astronomy
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Astronomy!. Emily Cunningham Institut d’Astrophysique de Paris. What do astronomers study?. 1. Planets. 2. Stars. SUPERNOVA! (NASA). BLACK HOLE!. Image: NASA. 3. Galaxies. Andromeda Galaxy (M31). Image: NASA. 4. Clusters of Galaxies. Abell Cluster of Galaxies. Image: NASA.

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Astronomy!

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Astronomy

Astronomy!

Emily Cunningham

Institutd’Astrophysique de Paris


What do astronomers study

What do astronomers study?


1 planets

1. Planets


2 stars

2. Stars

SUPERNOVA! (NASA)

BLACK HOLE!

Image: NASA


3 galaxies

3. Galaxies

Andromeda Galaxy (M31). Image: NASA


4 clusters of galaxies

4. Clusters of Galaxies

Abell Cluster of Galaxies. Image: NASA


5 the universe cosmology

5. The Universe: Cosmology


Astronomy

How do astronomers study the universe?


How do astronomers study

How do astronomers study?

  • Observations: Telescopes

  • Theory: Computer Simulations and Models


Observations

Observations

  • Ground-Based

Kitt Peak National Observatory, Arizona, United States


Observations1

Observations

  • Ground-Based

Keck Telescopes: Mauna Kea, Hawaii, United States


Observations2

Observations

2. Space-Based

Hubble Space Telescope (HST)


Astronomy

Thierry Cohen, www.newyorktimes.com


Astronomy

Thierry Cohen, www.newyorktimes.com


2 theory computer simulations

2. Theory: Computer Simulations!


The speed of light

The Speed of Light

  • Speed of light: c = 3.00 x 108 m/s

  • Because light has a finite speed, the light that reaches us from distant objects was emitted many (i.e. millions or billions) years ago

  • This means, in astronomy, looking far away is the same as looking back in time!


Astronomy

Night vision goggles can see infrared!

X-rays pass through your skin but not your bones!


Astronomy

Pinwheel Galaxy: Visible Light (Hubble Space Telescope)


Astronomy

Pinwheel Galaxy: Infrared (Spitzer Space Telescope)


Astronomy

Pinwheel Galaxy: X-Rays (Chandra X-Ray Observatory)


Astronomy

Pinwheel Galaxy: Infrared + Visible + X-ray


Elliptical galaxies

Elliptical Galaxies


Astronomy

Image: Hubble Space Telescope


Astronomy

Image: Hubble Space Telescope


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