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

Which astronomical phenomenon is commonly used to measure the distance to distant galaxies?

  1. Parallax

  2. Redshift

  3. Gravitational lensing

  4. Cosmic microwave background radiation
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Redshift, the change in the wavelength of light due to the expansion of the universe, is commonly used to measure the distance to distant galaxies.

Multiple choice

What is the name of the astronomical survey that provided the first direct evidence for the existence of dark energy?

  1. High-z Supernova Search Team

  2. Supernova Cosmology Project

  3. Sloan Digital Sky Survey

  4. 2dF Galaxy Redshift Survey
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The High-z Supernova Search Team provided the first direct evidence for the existence of dark energy through observations of distant supernovae.

Multiple choice

Which of the following is NOT a major galaxy survey?

  1. Sloan Digital Sky Survey (SDSS)

  2. Two Micron All Sky Survey (2MASS)

  3. Galaxy Evolution Explorer (GALEX)

  4. Hubble Space Telescope (HST)
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The Hubble Space Telescope is a space telescope, not a galaxy survey.

Multiple choice

Which of the following is NOT a type of galaxy observed by the Hubble Space Telescope (HST)?

  1. Elliptical galaxies

  2. Spiral galaxies

  3. Lenticular galaxies

  4. Irregular galaxies
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Lenticular galaxies are not observed by the HST.

Multiple choice

What is the name of the largest and most detailed galaxy survey to date?

  1. Sloan Digital Sky Survey (SDSS)

  2. Two Micron All Sky Survey (2MASS)

  3. Galaxy Evolution Explorer (GALEX)

  4. Dark Energy Survey (DES)
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The DES is the largest and most detailed galaxy survey to date.

Multiple choice

What is the primary goal of the Dark Energy Survey (DES)?

  1. To measure the expansion rate of the universe

  2. To search for dark matter

  3. To study the evolution of galaxies

  4. To detect gravitational waves
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The primary goal of the DES is to measure the expansion rate of the universe.

Multiple choice

Which of the following is NOT a type of observation made by galaxy surveys?

  1. Imaging

  2. Spectroscopy

  3. Photometry

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

Astrometry is not a type of observation made by galaxy surveys.

Multiple choice

What is the name of the instrument used to obtain spectra of galaxies in the Sloan Digital Sky Survey (SDSS)?

  1. BOSS

  2. MANGA

  3. SEGUE

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

The BOSS instrument is used to obtain spectra of galaxies in the SDSS.

Multiple choice

Which of the following is NOT a type of data product from the Two Micron All Sky Survey (2MASS)?

  1. Images

  2. Catalogs

  3. Spectra

  4. Photometric redshifts
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The 2MASS does not produce spectra.

Multiple choice

What is the name of the instrument used to obtain images of galaxies in the Galaxy Evolution Explorer (GALEX) mission?

  1. NUV

  2. FUV

  3. GIS

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

The GALEX mission uses two instruments, NUV and FUV, to obtain images of galaxies.

Multiple choice

Which of the following is NOT a type of data product from the Hubble Space Telescope (HST)?

  1. Images

  2. Spectra

  3. Photometry

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

The HST does not produce astrometry data.

Multiple choice

What is the name of the instrument used to obtain spectra of galaxies in the Dark Energy Survey (DES)?

  1. DECam

  2. DESI

  3. MUSE

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

The DESI instrument is used to obtain spectra of galaxies in the DES.

Multiple choice

Which of the following is NOT a type of data product from the Dark Energy Survey (DES)?

  1. Images

  2. Catalogs

  3. Spectra

  4. Photometric redshifts
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The DES does not produce spectra.

Multiple choice

What is the name of the instrument used to obtain images of galaxies in the James Webb Space Telescope (JWST) mission?

  1. NIRCam

  2. MIRI

  3. NIRSpec

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

The JWST mission uses two instruments, NIRCam and MIRI, to obtain images of galaxies.

Multiple choice

What is the primary mechanism responsible for synchrotron radiation in our galaxy?

  1. Thermal emission from interstellar gas

  2. Relativistic electrons spiraling in magnetic fields

  3. Recombination of hydrogen atoms

  4. Bremsstrahlung from collisions between electrons and ions
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Synchrotron radiation is produced when relativistic electrons spiral in magnetic fields, emitting electromagnetic radiation in the radio spectrum.