Physics · General Awareness

Astronomy and Space Science

3,057 Questions

Astronomy and Space Science questions explore observational instruments, spectroscopy, space stations, and astrostatistics. These scientific concepts are vital for SSC, railways, and UPSC preliminary exams. Test your knowledge of space technology and astronomical history with these practice questions.

Spectroscopy techniquesSpace station usesAstronomical instrumentsAstrostatistics basicsExoplanet research programs

Astronomy and Space Science Questions

Multiple choice

Kepler added support to Copernicus's theory by

  1. publishing the theory in a book that many people read

  2. inventing a device for seeing the night sky more accurately

  3. writing mathematical laws that described how planets move

  4. showing that using the theory would improve safety at sea.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Kepler used the observational data of Tycho Brahe to derive his laws of planetary motion, which mathematically described elliptical orbits and provided the necessary support for the heliocentric model.

Multiple choice

Explorers encourage the growth of science by

  1. creating a need to study the stars

  2. arguing against the power of the RCC

  3. writing exaggerated accounts of their travels

  4. showing that accepted beliefs could be wrong
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Explorers encountered new lands, peoples, and phenomena that did not fit into the established knowledge of the time, which challenged the authority of ancient texts and encouraged empirical observation.

Multiple choice physics observing space: telescopes space research and satellites space travel space exploration and forms of light

Telescopic aids are used:

  1. to view planets and other astronomical activities

  2. to view chalkboards and class demonstrations

  3. for performing computational tasks

  4. helps visuaaly challenged people in reading and writing
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Telescopic aids comes under optical aids.Telescopic aids are available to view chalkboards and class demonstrations

Multiple choice physics observing space: telescopes space research and satellites space travel space exploration and forms of light

Why is it advised to use telescope in a clear sky?

  1. Less interference between telescope and object.

  2. To get better quality of image

  3. To reduce the lateral shift in images caused by the environment

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

In a clear sky, images formed by telescope are much sharper because of the following reasons:

1. Atmospheric interference is reduced significantly reduced and only the required object is projected.
2. Since rays don't change much speed on a clear day, image is distortionless and quality is improved.
3. On a clear sky, lateral displacement of object is either negligible or don't change much in small time intervals and this helps in studying the bodies well.

Multiple choice geography space travel space research and satellites space exploration and forms of light optical telescope

Which of the following is cannot be considered as the use of space stations?

  1. Space station is used to study the effects of long-duration spaceflight on the human body

  2. Space station provides a platform for greater number and length of scientific studies than it is available on other space vehicles.

  3. Space stations are used both for military and civilian purposes.

  4. None of these
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Space stations are made to conduct experiments that needs to be done out in space. It is used to study the effects of long-duration space flight on human body. These provides a platform for greater number and length of scientific studies than it is available on other space vehicles and other military and civilian purposes.

Multiple choice physics units and measurement: error analysis rounding off digits rounding of digits standard form

The radius of the sun is $7\times 10^8 m$ and its mass is $2\times 10^{30} kg$. What is the order of magnitude of density of the sun?

  1. $1.4\times 10^3 kg/m^3$
  2. $ 10^7 kg/m^3$
  3. $1.5\times 10^3 kg/m^3$
  4. $10^3 kg/m^3$
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Given :  $R = 7\times 10^8 \ m$     and    $M = 2\times 10^{30} \ kg$
Volume of sun  $V = \dfrac{4}{3}\pi R^3 = \dfrac{4}{3}\pi\times (7\times 10^8)^3 = 1.4\times 10^{27} \ m^3$
Density of sun   $\rho = \dfrac{M}{V} = \dfrac{2\times 10^{30}}{1.4\times 10^{27}} = 1.43\times 10^3 \ kg/m^3$
Thus order of magnitude of density of sun is $10^3 \ kg/m^3$.

Multiple choice

What creates craters?

  1. rockets

  2. meteoroids
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Craters on the moon are primarily formed by the impact of meteoroids, asteroids, and comets hitting the surface.

Multiple choice

What are comets mostly made of?

  1. Dirty ice and dust

  2. Poisonous liquid

  3. Rusty metal

  4. Hot, liquid rock
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Comets are often described as 'dirty snowballs' because they consist primarily of ice, dust, and rocky material that vaporizes as they approach the sun.

Multiple choice

The James Webb Space Telescope is expected to make significant contributions to our understanding of the universe. Which of the following is NOT a primary scientific goal of the James Webb Space Telescope?

  1. Studying the formation and evolution of galaxies

  2. Searching for signs of life on other planets

  3. Observing the early universe shortly after the Big Bang

  4. Measuring the distance to nearby stars
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Measuring the distance to nearby stars is not a primary scientific goal of the James Webb Space Telescope. Its main objectives are to study the early universe, the formation and evolution of galaxies, and the properties of exoplanets.

Multiple choice

The Very Large Telescope has been used to make important observations in various areas of astronomy. Which of the following is NOT a major discovery made using the Very Large Telescope?

  1. Direct imaging of an exoplanet

  2. Detection of gravitational waves

  3. Confirmation of the existence of supermassive black holes in the centers of galaxies

  4. Detailed observations of the surface of the Sun
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The Very Large Telescope has not been used to study the surface of the Sun in detail. Its primary focus has been on observing distant objects in the universe, such as galaxies, nebulae, and exoplanets.

Multiple choice

What is the primary purpose of data collection in astronomical observatories?

  1. To gather information about celestial objects and phenomena.

  2. To monitor the weather conditions.

  3. To track the movement of satellites.

  4. To communicate with extraterrestrial beings.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Astronomical observatories collect data to study the properties, behavior, and evolution of celestial objects and phenomena, such as stars, planets, galaxies, and cosmic events.

Multiple choice

What is the role of telescopes in data collection at astronomical observatories?

  1. To magnify distant objects.

  2. To collect light from celestial objects.

  3. To analyze the collected data.

  4. To store the collected data.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Telescopes are used to gather and focus light from celestial objects, enabling astronomers to observe and study them in detail.

Multiple choice

What is the purpose of using detectors in astronomical observatories?

  1. To convert light into electrical signals.

  2. To amplify the collected light.

  3. To process the collected data.

  4. To store the collected data.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Detectors, such as CCDs (Charge-Coupled Devices), are used to convert the collected light from celestial objects into electrical signals, which can then be processed and analyzed.