Chapter 6 study guide

What does CCD mean?

Charged Coupled Device (A digital camera)

What do interferometric arrays do?

Combine signals from many telescopes, increasing resolution

Why do single radio telescopes have poor resolution?

Due to long wavelengths

The first person who regularly turned a telescope to astronomical observations (and published his observations) was:

Galileo Galilei

What do spectrographs measure?

Measure spectral lines, composition of objects

Whats in the nucleus and surrounding it?

Protons (Positive) Neutrons (Neutral) Surrounded by Electrons (Negative Charge)

Which type of ground-based telescope can be routinely used for observing during the day?

Radio telescopes

The bending of light when it passes into a new medium is known as

Refraction

The earliest telescopes used by astronomers were:

Refractors

What is Aperture?

The size of the main lens or mirror in a telescope (Large apertures can collect more light

What do Radio dishs do?

Transmits data back to Earth

What can optical images detect?

Visible, infared and ultraviolet

The Chandra Observatory was designed to detect

X-rays

To break up light into the component colors that it contains, astronomers use a device called:

a spectrometer

A modern technique called adaptive optics allows astronomers to:

compensate for changes in the Earth's atmosphere and achieve better resolution

Which type of telescope captures radiation with the highest energy?

gamma ray telescopes

Using many radio telescopes together to view an astronomical object is known as

interferometry

reflecting telescope

telescope in which the principal light collector is a concave mirror

refracting telescope

telescope in which the principal light collector is a lens or system of lenses

When astronomers do radar astronomy, they

they bounce a radar beam off the surface of solid objects in our solar system

Which types of telescope can only be used above Earth's atmosphere?

x-ray telescopes