Detectors and Radio Telescopes
Telescopes and the Atmosphere
Star Formation
Optical Telescopes
100
Device used to collect light from a telescope and make an image.
What is a CCD, charge-coupled device?
100

Reason to put an infrared telescope on an airplane.

What is get above atmosphere?

100
Gas and dust between the stars. Stuff that stars are made of.
What is ISM, Interstellar Medium?
100

Type of telescope that uses mirrors.

What is a reflector?

200

In a CCD, this creates a charge in a pixel.

What is a photon? Each charge then sends a signal to a computer. The computer added up charges/photons to make an image.

200

Where to put your telescope to view X-rays.

What is space?

200
Force that both holds ISM clouds together and causes them to collapse.
What is self-gravity?
200

This is what we mean by "size" of a telescope.

What is aperture? Or how big is the primary lens or mirror.

300
This is what radio telescopes use to collect light.
What is a large dish? Collects waves and directs them to the antenna. Antenna is like the CCD for radio telescopes, sends signal to computer. Radio telescopes do not use lenses or mirrors.
300

Wavelengths of light that can be observed from earth's surface.

What is visible and radio?

300
These form when clouds fragment and collapse.
What are prestellar cores?
300

Location of the primary lens in a refractor.

What is at the opening to the sky? The end farthest from the eye of the observer.

400
The dense center of a collapsed core that will likely become a star.
What is a protostar?
400

A limitation to making big refractor telescopes.

What is the weight of the lens? - it's too heavy. Also, the telescope has to be too long to get a large image from a long focal length.

500
When a group of cores form together from a single cloud, this is the likely result.
What is a cluster of stars? Hundreds of cores can form from one cloud resulting in a large cluster of different mass stars. Cores can also collapse alone forming a single star.
500

Part of a reflector that allows it to have a long focal length, but still be a short telescope.

What is the secondary mirror? It bounces light back from the primary (at the base of the telescope) to the eye (also at the base). So the focal length is longer than the actual telescope.

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