Astronomy Astronomy Telescopes and Instruments 2

Question 1

What instrument is used to measure the precise positions and proper motions of stars?

Accepted Answer

Astrograph

Answer

An astrograph is a telescope designed specifically for precise positional measurements of stars, including their proper motions across the sky.

Question 2

What does the Chandra X-ray Observatory primarily detect?

Accepted Answer

X-rays from hot gas and energetic phenomena

Answer

Chandra detects X-rays emitted by extremely hot gas around black holes, supernovae remnants, and galaxy clusters.

Question 3

What is the purpose of a coronagraph in a telescope?

Accepted Answer

Block the bright light of a star to observe nearby faint objects

Answer

A coronagraph blocks the central bright light of a star, allowing astronomers to observe nearby faint objects like exoplanets or the solar corona.

Question 4

What does the acronym 'CCD' stand for in astronomical imaging?

Accepted Answer

Charge-Coupled Device

Answer

CCD stands for Charge-Coupled Device, a highly sensitive electronic image sensor that has largely replaced photographic film in modern astronomy.

Question 5

What is stellar interferometry used to measure?

Accepted Answer

The angular diameters of distant stars

Answer

Stellar interferometry combines light from multiple telescope apertures to measure the angular diameters of stars too small to resolve with a single telescope.

Astronomy Practice Test

Astronomy Practice Test

Astronomy Astronomy Telescopes and Instruments 2