Physics · Science General

Astronomy and Cosmology

4,498 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 social science universe and space the big bang and the early development of the universe origin of universe evolution of the universe

The large bright stars with a cool surface of ${2000}^{o}C$ to ${3000}^{o}C$, formed during the later stages of the evolution of a star like the sun as it runs out of ${H} {2}$ fuel at its center are __________.

  1. red dwarf

  2. white dwarf

  3. red giants

  4. brown dwarf
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Large bright stars with a cool surface of 2000oC to 3000oC, formed during the later stages of the evolution of a star like the sun as it runs out of H2 fuel at its center are Red giants

Ans: Red giants

Multiple choice social science universe and space the big bang and the early development of the universe origin of universe evolution of the universe

Horse head Nebula in Orion are dense clouds of molecular hydrogen which partially or completely absorb the light from the stars behind them. These are called ___________.

  1. planetary nebula

  2. dark nebula

  3. reflection nebula

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

Horse head nebula are called dark nebula.

Ans: Dark Nebula

Multiple choice social science universe and space the big bang and the early development of the universe origin of universe evolution of the universe

_________ are the outer layers of a star that are lost when the star changes from a red giant to white dwarf.

  1. planetary nebula

  2. dark nebula

  3. reflection nebula

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

Planetary Nebula are outer layers of a star that are lost when the star changes from red giant to white dwarf

Ans: Planetary Nebula

Multiple choice social science universe and space the big bang and the early development of the universe origin of universe evolution of the universe

Which is NOT true of quasars ?

  1. The name "quasar" comes from "quasi-stellar radio source."

  2. Quasars are believed to be exploding stars.

  3. Quasars can be one hundred times as luminous as the Milky Way Galaxy.

  4. Quasars are found near the centre of large galaxies.

  5. the energy from quasars is thought to come from regions just outside super-massive black holes.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Quasars cannot be the exploding star in our galaxy as they are the centers of other galaxies , most distant object from earth . Quasars have nothing common with regular stars , only they are the galaxies of stars.

Multiple choice social science universe and space the big bang and the early development of the universe origin of universe evolution of the universe

Most of the helium in the Universe is believed to have been produced in-

  1. red giants

  2. the Big Bang

  3. supernovae

  4. none of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Big Bang nucleosynthesis is the process that occurred in the early universe, creating most of the light elements, including helium, hydrogen, and trace amounts of lithium.

Multiple choice social science universe and space the big bang and the early development of the universe origin of universe evolution of the universe

There are two ways to measure the brightness of a star; the apparent magnitude of the brightness of the star is the brightness seen from the earth and absolute magnitude of the brightness of the star which is the brightness of a star seen from the standard distance of ___________.

  1. $10$ parsec
  2. $32.6$ light years
  3. $3.26$ light years

  4. both (a) and (b)
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Absolute magnitude is defined as the apparent magnitude a star would have if it were at a distance of 10 parsecs from Earth. Since 1 parsec is approximately 3.26 light-years, 10 parsecs is equal to 32.6 light-years.

Multiple choice geography hydrologic cycle the atmosphere elements of weather and climate :humidity hydrologic cycle and its components elements of weather and climate : temperature

The North Star is a part of the constellation ____________.

  1. Orion

  2. Big dipper

  3. Cassiopsiea

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

The North Star (Polaris) is part of the Little Dipper constellation, also known as Ursa Minor. It is the brightest star in this constellation and is located at the end of the Little Dipper's handle. The Big Dipper is part of Ursa Major, Orion is a separate constellation, and Cassiopeia is another distinct constellation.

Multiple choice geography sun: the ultimate source elements of weather and climate : temperature the atmosphere elements of weather and climate :humidity

The change in colour of stars arises due to ________________________.

  1. variation in their distance from the earth

  2. variation in their surface temperature

  3. fluctuations in their composition and size

  4. irregular absorption or scattering in earth's atmosphere
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The color of a star is primarily determined by its surface temperature. Hotter stars appear blue or white, while cooler stars appear red or orange.

Multiple choice evs - i the earth and its living world introduction to the spheres of the earth origin of universe introduction to natural resources

Faint band of stars observed in the night sky from north to south direction is :

  1. Spiral arm of Milky way

  2. Galactic disc of Milky way

  3. Edge of Milky way

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

The faint band of stars seen across the night sky is the view of the Milky Way's galactic disc from our perspective inside the galaxy.