ASP Knowledge 3

Question 1

What phenomenon describes the reddening of starlight as a star moves away from the observer?

Accepted Answer

Redshift

Answer

Redshift occurs due to the Doppler effect when a light source moves away, stretching wavelengths toward the red end of the spectrum.

Question 2

What is the primary composition of a comet's nucleus?

Accepted Answer

Ice and dust

Answer

Comet nuclei are composed mainly of ice (water, carbon dioxide, methane) mixed with dust and rocky material, earning them the nickname 'dirty snowballs.'

Question 3

Which planet has the largest known moon in the solar system?

Accepted Answer

Jupiter

Answer

Ganymede, a moon of Jupiter, is the largest moon in the solar system, even larger than the planet Mercury.

Question 4

What is the name of the process by which a star converts hydrogen into helium in its core?

Accepted Answer

Nuclear fusion

Answer

Stars generate energy through nuclear fusion, combining hydrogen nuclei under extreme pressure and temperature to form helium.

Question 5

The celestial coordinate equivalent of longitude on Earth is called:

Accepted Answer

Right ascension

Answer

Right ascension is the celestial equivalent of geographic longitude, measured in hours eastward from the vernal equinox.

ASP - Astronomical Society of the Pacific Exam Practice Test

ASP - Astronomical Society of the Pacific Exam Practice Test

ASP Knowledge 3