Question 1

Discuss two advantages of flyby missions over orbiters in exploring planets and moons in the Solar System.

Accepted Answer

First, flyby missions are rela

Question 2

The 305-meter Arecibo radio telescope in Puerto Rico has a resolution that is closest to that of:

Accepted Answer

A)  the Hubble Space Telescope (0.1 arcsec) 
B)  a human eye (1 arcmin) 
C)  the Chandra X-ray telescope (0.5 arcsec) 
D)  a 1-meter optical telescope (1 arcsec) 
E)  one of the 10-meter Keck telescopes (0.0133 arcsec) 
A)  the Hubble Space Telescope (0.1 arcsec) 
B)  a human eye (1 arcmin) 
C)  the Chandra X-ray telescope (0.5 arcsec) 
D)  a 1-meter optical telescope (1 arcsec) 
E)  one of the 10-meter Keck telescopes (0.0133 arcsec)

Question 3

Which of the following phenomena is shown in the figure below?

Accepted Answer

A)  reflection 
B)  chromatic aberration 
C)  diffraction 
D)  magnification 
E)  interference 
A)  reflection 
B)  chromatic aberration 
C)  diffraction 
D)  magnification 
E)  interference

Question 4

Which telescope would collect 100 times more light than a 1-meter telescope?

Accepted Answer

A)  100-meter telescope 
B)  80-meter telescope 
C)  50-meter telescope 
D)  30-meter telescope 
E)  10-meter telescope 
A)  100-meter telescope 
B)  80-meter telescope 
C)  50-meter telescope 
D)  30-meter telescope 
E)  10-meter telescope

Question 5

Explain three major advantages of CCDs over other imaging techniques.

Accepted Answer

These are possible answers:
(1) They hav

Question 6

One reason to prefer a reflecting over a refracting telescope is:

Accepted Answer

A)  its lack of chromatic aberration 
B)  its shorter length for the same aperture size 
C)  there is no aperture limit 
D)  its lighter weight for larger apertures 
E)  all of the above are valid reasons 
A)  its lack of chromatic aberration 
B)  its shorter length for the same aperture size 
C)  there is no aperture limit 
D)  its lighter weight for larger apertures 
E)  all of the above are valid reasons

Question 7

The first astronomical radio source ever observed was:

Accepted Answer

A)  the Andromeda Galaxy 
B)  the galactic center, in the constellation Sagittarius 
C)  thunderstorms 
D)  the Earth 
E)  Jupiter 
A)  the Andromeda Galaxy 
B)  the galactic center, in the constellation Sagittarius 
C)  thunderstorms 
D)  the Earth 
E)  Jupiter

Question 8

Large reflecting telescopes have mirrors that are _________ in shape.

Accepted Answer

A)  spherical 
B)  parabolic 
C)  convex 
D)  hyperbolic 
E)  cylindrical 
A)  spherical 
B)  parabolic 
C)  convex 
D)  hyperbolic 
E)  cylindrical

Question 9

Explain how adaptive optics help compensate for atmospheric seeing.

Accepted Answer

Slight perturbances in the atmosphere ca

Question 10

A prism is able to spread white light out into a spectrum of colors based on the property of:

Accepted Answer

A)  reflection 
B)  refraction 
C)  magnification 
D)  resolution 
E)  aberration 
A)  reflection 
B)  refraction 
C)  magnification 
D)  resolution 
E)  aberration

Question 11

Chromatic aberration results from:

Accepted Answer

A)  blue light being reflected more than red light 
B)  red light being reflected more than blue light 
C)  red light being refracted more than blue light 
D)  blue light being refracted more than red light 
E)  a lens being polished incorrectly 
A)  blue light being reflected more than red light 
B)  red light being reflected more than blue light 
C)  red light being refracted more than blue light 
D)  blue light being refracted more than red light 
E)  a lens being polished incorrectly

Question 12

Calculate the resolution of an interferometric array consisting of five 10-m radio telescopes, each located 1,000 meters apart from each other and observing a distant object at a wavelength of 21 cm.

Accepted Answer

@#LAT-DLM& = 2.06 * 10⁵ *(@#LAT-DLM&/D

Question 13

Grote Reber conducted the first radio survey of the sky in the 1930s and 1940s with his 9-meter diameter radio telescope. Why did his telescope need to be so large?

Accepted Answer

A)  He needed a large light-collecting area because radio sources are notoriously dim. 
B)  He needed better angular resolution to identify sources because radio waves are so long. 
C)  He needed a higher magnification to identify sources because radio sources are quite small. 
D)  He needed a longer focal length since radio sources are so far away. 
E)  He needed a shorter focal length since radio sources are so far away. 
A)  He needed a large light-collecting area because radio sources are notoriously dim. 
B)  He needed better angular resolution to identify sources because radio waves are so long. 
C)  He needed a higher magnification to identify sources because radio sources are quite small. 
D)  He needed a longer focal length since radio sources are so far away. 
E)  He needed a shorter focal length since radio sources are so far away.

Question 14

What type of waves have NOT yet been directly detected by astronomers?

Accepted Answer

A)  sound waves 
B)  gravitational waves 
C)  X-ray waves 
D)  gamma-ray waves 
E)  pressure waves 
A)  sound waves 
B)  gravitational waves 
C)  X-ray waves 
D)  gamma-ray waves 
E)  pressure waves

Discuss two advantages of flyby missions over orbiters in exploring planets and moons in the Solar System.

The 305-meter Arecibo radio telescope in Puerto Rico has a resolution that is closest to that of:

Which of the following phenomena is shown in the figure below?

Which telescope would collect 100 times more light than a 1-meter telescope?

Explain three major advantages of CCDs over other imaging techniques.

One reason to prefer a reflecting over a refracting telescope is:

The first astronomical radio source ever observed was:

Large reflecting telescopes have mirrors that are _________ in shape.

Explain how adaptive optics help compensate for atmospheric seeing.

A prism is able to spread white light out into a spectrum of colors based on the property of:

Chromatic aberration results from:

Calculate the resolution of an interferometric array consisting of five 10-m radio telescopes, each located 1,000 meters apart from each other and observing a distant object at a wavelength of 21 cm.

Grote Reber conducted the first radio survey of the sky in the 1930s and 1940s with his 9-meter diameter radio telescope. Why did his telescope need to be so large?

What type of waves have NOT yet been directly detected by astronomers?

Why Learn Astronomy

Patterns in the Skymotions of Earth

Motion of Astronomical Bodies

Gravity and Orbits

Light

The Birth and Evolution of Planetary Systems

The Terrestrial Planets and Earths Moon

Atmospheres of the Terrestrial Planets

Worlds of Gas and Liquid the Giant Planets

Planetary Adornmentsmoons and Rings

Dwarf Planets and Small Solar System Bodies

Taking the Measure of Stars

Our Starthe Sun

Star Formation and the Interstellar Medium

Evolution of Low-Mass Stars

Evolution of High-Mass Stars

Relativity and Black Holes

The Expanding Universe

Galaxies

The Milky Waya Normal Spiral Galaxy

Modern Cosmology

Large-Scale Structure in the Universe

Life

Filters

Exam 6: The Tools of the Astronomer

Discuss two advantages of flyby missions over orbiters in exploring planets and moons in the Solar System.

The 305-meter Arecibo radio telescope in Puerto Rico has a resolution that is closest to that of:

Which of the following phenomena is shown in the figure below?

Which telescope would collect 100 times more light than a 1-meter telescope?

Explain three major advantages of CCDs over other imaging techniques.

One reason to prefer a reflecting over a refracting telescope is:

The first astronomical radio source ever observed was:

Large reflecting telescopes have mirrors that are _________ in shape.

Explain how adaptive optics help compensate for atmospheric seeing.

A prism is able to spread white light out into a spectrum of colors based on the property of:

Chromatic aberration results from:

Calculate the resolution of an interferometric array consisting of five 10-m radio telescopes, each located 1,000 meters apart from each other and observing a distant object at a wavelength of 21 cm.

Grote Reber conducted the first radio survey of the sky in the 1930s and 1940s with his 9-meter diameter radio telescope. Why did his telescope need to be so large?

What type of waves have NOT yet been directly detected by astronomers?

Why Learn Astronomy

Patterns in the Skymotions of Earth

Motion of Astronomical Bodies

Gravity and Orbits

Light

The Birth and Evolution of Planetary Systems

The Terrestrial Planets and Earths Moon

Atmospheres of the Terrestrial Planets

Worlds of Gas and Liquid the Giant Planets

Planetary Adornmentsmoons and Rings

Dwarf Planets and Small Solar System Bodies

Taking the Measure of Stars

Our Starthe Sun

Star Formation and the Interstellar Medium

Evolution of Low-Mass Stars

Evolution of High-Mass Stars

Relativity and Black Holes

The Expanding Universe

Galaxies

The Milky Waya Normal Spiral Galaxy

Modern Cosmology

Large-Scale Structure in the Universe

Life

Filters