Physics ยท Science General

Astronomy and Cosmology

4,450 Questions

This topic provides questions on astronomy, cosmology, and the physical universe. It covers subjects like the Hubble sequence, constellations, dark matter, and stellar evolution. These questions help build a strong foundation for general science exam sections.

Galaxies and clustersConstellations and starsStellar evolutionSpace observatories

Astronomy and Cosmology Questions

Multiple choice

Starkiller Base ran on what dark energy?

  1. Hosnian Power

  2. Enterprise

  3. Quintessence

  4. Dark Kyber Force
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Starkiller Base was powered by harvesting 'quintessence', a form of dark energy, from the core of the planet Ilum.

Multiple choice

What are baby stars called?

  1. Nebula

  2. Protostar

  3. Supernova

  4. Constellation
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A protostar is a young, developing star that is still gathering mass from its parent molecular cloud. It represents the early stage of stellar evolution.

Multiple choice

What are the gas/dust clouds that form stars?

  1. Nebula

  2. Protostar

  3. Supernova

  4. Constellation
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A nebula is an enormous cloud of dust and gas in space that serves as the nursery where new stars are born. Gravity causes these clouds to collapse and form stars.

Multiple choice

What is a pattern of stars called?

  1. Nebula

  2. Protostar

  3. Supernova

  4. Constellation
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

A constellation is a group of stars that forms an imaginary outline or pattern on the celestial sphere. These patterns are often named after mythological figures or objects.

Multiple choice

Why are other stars so small?

  1. They are so small

  2. They're so far away

  3. The sun is huuuge
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Stars appear small in the night sky because they are at immense distances from Earth. Even though many are much larger than the Sun, their distance makes them appear as mere points of light.

Multiple choice

Is our sun the biggest star in the sky?

  1. yes

  2. no
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

There are many stars in the universe, such as UY Scuti or Betelgeuse, that are significantly larger than our sun. The sun is only the biggest star from our perspective because it is the closest one to Earth.

Multiple choice

How many stars are in our solar system?

  1. 0

  2. 1

  3. thousands

  4. billions
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Our solar system is defined by the sun, which is the only star within it. Other stars are located in different solar systems or galaxies.

Multiple choice

When looking at Main Sequence stars we can say that...

  1. the brighter, the cooler

  2. the brighter, the hotter

  3. the hotter, the dimmer

  4. The redder, the hotter
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

For main sequence stars, there is a direct correlation between temperature and luminosity. Hotter stars appear brighter and bluer, while cooler stars appear dimmer and redder.

Multiple choice

What is a difference between planets and stars?

  1. they are the same

  2. planets twinkle

  3. stars twinkle

  4. stars make more money
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Stars twinkle because their light is distorted by the Earth's atmosphere, whereas planets appear as steady points of light because they are much closer to Earth.

Multiple choice evs sun and planets moon the moon's path in the sky the moon

The large grouping of stars, dust and gas held together by gravity are called:

  1. Galaxies

  2. Nebulae

  3. Pulse

  4. Comets
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Galaxies are large grouping of stars, dust and gas held together by gravity.
Nebulae : cosmic element of gas
Pulse: The rapidly pulse
Comets: Left ones from formation of planetary system

Multiple choice physics gravitation elementary ideas of astronomy shadow formation and optical medium light and shadow

Following factors may be responsible for the colour of a star.
I. The size of the star
II. The distance of the star from the earth
III. The surface temperature of the star
Which combination is correct?

  1. III only

  2. II only

  3. I and II only

  4. I, II and III
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Factor responsible for colour of the star is surface temperature of the star it does not depend upon size of the star and distance of star from the earth.