Observational Astronomy MCQs with Answers

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Observational Astronomy Online Quiz

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• Test Name: Observational Astronomy MCQ Quiz Practice
• Type: Quiz Test
• Total Questions: 40
• Total Marks: 40
• Time: 40 minutes

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Observational Astronomy

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1 / 40

What is the purpose of the Gaia mission?

To explore the surface of Mars

To create a precise 3D map of the stars in our galaxy

To study the outer planets

2 / 40

What is a spectrometer used for in astronomy?

To analyze the light spectrum from celestial objects

To detect gravitational waves

To measure the distance to stars

3 / 40

What is the zodiacal light?

The glow from distant galaxies

A faint, diffuse, triangular glow visible in the night sky, caused by sunlight scattering off interplanetary dust

The light from the zodiac constellations

4 / 40

What is the term for a small, rocky body orbiting the Sun?

Asteroid

Meteor

Comet

5 / 40

What is the name of the telescope launched by NASA to study exoplanets using the transit method?

Chandra

Kepler

Hubble

6 / 40

What is the purpose of an observatory dome?

To store astronomical data

To provide living quarters for astronomers

To protect telescopes from the elements and reduce temperature fluctuations

7 / 40

What is the largest type of optical telescope?

Radio telescope

Refracting telescope

Reflecting telescope

8 / 40

What is the primary purpose of a telescope?

To navigate at sea

To measure distances

To collect and magnify light

9 / 40

What is the Hertzsprung-Russell diagram?

A graph that plots stars according to their luminosity and temperature

A map of the distribution of galaxies

A chart showing the positions of planets

10 / 40

What is a refracting telescope?

A telescope that detects radio waves

A telescope that uses lenses to focus light

A telescope that uses mirrors to focus light

11 / 40

What is a type II supernova?

A supernova that results from the rapid collapse and violent explosion of a massive star

A supernova that occurs in very old stars

A type of nova occurring in binary systems

12 / 40

What is a light curve in astronomy?

A spectrum of light from a star

A graph of light intensity of a celestial object over time

A map of the distribution of light in the sky

13 / 40

What is the primary advantage of space telescopes over ground-based telescopes?

They are closer to the stars

They are easier to maintain

They are above the Earth's atmosphere, which distorts and absorbs certain wavelengths of light

14 / 40

What is a reflecting telescope?

A telescope that detects radio waves

A telescope that uses mirrors to focus light

A telescope that uses lenses to focus light

15 / 40

What is the apparent magnitude of a star?

The size of a star

The actual brightness of a star

The brightness of a star as seen from Earth

16 / 40

What is adaptive optics?

A system for tracking stars

A technology that adjusts the telescope's mirror to compensate for atmospheric distortion

A method for cooling telescopes

17 / 40

What is the Doppler effect in astronomy?

The change in frequency or wavelength of light from an object moving toward or away from the observer

The spreading of light through a prism

The bending of light by gravity

18 / 40

What is the term for the sudden, bright streak of light caused by a meteoroid entering Earth's atmosphere?

Meteoroid

Meteorite

Meteor

19 / 40

What is an astronomical unit (AU)?

The distance light travels in one year

The diameter of the Earth

The average distance between the Earth and the Sun

20 / 40

What is a nova?

A star that is forming

A galaxy that is forming

A sudden, dramatic increase in brightness of a star

21 / 40

What is a photometer?

An instrument that measures the intensity of light

An instrument that detects radio waves

An instrument that measures the distance to stars

22 / 40

What is the Hubble Space Telescope?

A radio telescope

A ground-based telescope

A space telescope that observes in visible, ultraviolet, and near-infrared spectra

23 / 40

What is a light-year?

The distance light travels in one year

The distance between the Earth and the Sun

The time it takes for light to travel from the Sun to Earth

24 / 40

What is blueshift?

The spreading of light through a prism

The decrease in wavelength of light from an object moving toward the observer

The increase in wavelength of light from an object moving away from the observer

25 / 40

What is the term for a small, icy body that, when passing close to the Sun, displays a visible coma (a thin, fuzzy, temporary atmosphere) and sometimes a tail?

Comet

Asteroid

Meteor

26 / 40

What is a binary star system?

A system where two stars orbit around their common center of mass

A single star with two planets

A star that splits into two

27 / 40

What is a light pollution?

The natural dimming of celestial objects

The scattering of light by the atmosphere

The brightening of the night sky caused by street lights and other man-made sources, which interferes with astronomical observations

28 / 40

What is the purpose of the event horizon telescope (EHT)?

To image black holes

To observe gamma-ray bursts

To measure the distance to nearby stars

29 / 40

What is the electromagnetic spectrum?

The range of all types of electromagnetic radiation

The spectrum of light emitted by stars

The range of visible light

30 / 40

What is a type Ia supernova?

A type of nova occurring in young stars

A type of supernova that occurs in binary systems where one star is a white dwarf

A supernova that results from the collapse of a massive star

31 / 40

What is parallax in astronomy?

The spreading of light through a prism

The bending of light by gravity

The apparent shift in position of a nearby star against the background of distant objects as seen from different points in Earth's orbit

32 / 40

What is the purpose of a star chart?

To map the positions of stars and constellations in the sky

To measure the brightness of stars

To calculate the distance to stars

33 / 40

What is a light curve used to study?

The distribution of light in the sky

The spectrum of light from a star

Variability in the brightness of celestial objects over time

34 / 40

What is redshift?

The splitting of light into its component colors

The decrease in wavelength of light from an object moving toward the observer

The increase in wavelength of light from an object moving away from the observer

35 / 40

What is the Messier catalog?

A list of 110 astronomical objects, including star clusters, nebulae, and galaxies, compiled by Charles Messier

A catalog of stars in our galaxy

A list of exoplanets

36 / 40

What is the function of a radio telescope?

To observe visible light from stars

To measure the distance to planets

To detect and collect radio waves from space

37 / 40

What is interferometry?

A way to measure the brightness of stars

A technique that combines the signals from multiple telescopes to achieve higher resolution

A method for cooling telescopes

38 / 40

What is the term for a meteoroid that reaches Earth's surface without burning up completely?

Meteorite

Meteoroid

Meteor

39 / 40

What is the absolute magnitude of a star?

The size of a star

The brightness of a star as seen from Earth

The actual brightness of a star if it were at a standard distance of 10 parsecs from Earth

40 / 40

What is the event horizon of a black hole?

The center of a black hole

The boundary beyond which nothing can escape from a black hole

The disk of material around a black hole

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