Chapter 24 Flashcards

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1
Q

Who developed a system for naming stars that used Greek and Latin?

A

Bayer

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2
Q

What are used for giving the precise location of a star?

A

Declination and right ascension

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3
Q

In apparent magnitude, is the lower or higher number brighter?

A

Lower

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4
Q

Does apparent magnitude depend on the temperature of the star?

A

NO

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5
Q

According to Genesis 1:14, why did God create the stars?

A

For signs and seasons

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6
Q

What do cepheid variables do?

A

Make it easier to estimate the size of the universe

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7
Q

What is a light year?

A

The distance light travels in a year

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8
Q

What is used to estimate the distance to a dim, distant star?

A

Red shift

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9
Q

What makes up the bulk of elements in most stars?

A

Hydrogen and helium

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10
Q

What are used to classify luminosity?

A

Roman numerals

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11
Q

What are used as the axes to plot stars on the H-R diagram?

A

Temperature and luminosity

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12
Q

What are later stages in the life of a star?

A

Planetary nebulas, white dwarfs, and neutron stars

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13
Q

What do pulsars and quasars both release?

A

Radio waves

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14
Q

Do most galaxies have a super nova in the center of it?

A

NO

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15
Q

Where are protostars found?

A

In stellar nurseries

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16
Q

How old does the Standard Model of Cosmology say the universe is?

A

13.5 billion years old

17
Q

What is the actual brightness of a star called?

A

Absolute magnitude

18
Q

What is a star’s real motion a combination of?

A

Proper and radial motion

19
Q

Where are main-sequence stars found?

A

In the diagonal band of the H-R diagram

20
Q

What is a cloud of gas or dust that can be seen against a background of stars?

A

Nebula

21
Q

What Galaxy is our sun in?

A

Milky Way

22
Q

What is the study of how the universe began and how it changed over time?

A

Cosmology

23
Q

Who wrote an equation for calculating the probability of extraterrestrial life that led to SETI?

A

Drake

24
Q

Who created the New General Catalogue listing over 13,000 nebulas and other non-stellar objects?

A

Dreyer

25
Q

Who divided stars into six different ranks of magnitude?

A

Hipparchus

26
Q

Who developed the relationship between red shift and stellar distance?

A

Hubble

27
Q

Who proposed an idea that became the Big Bang Theory?

A

Lemaitre

28
Q

Who created an early catalog of non-stellar objects and used Ms to distinguish them?

A

Messier

29
Q

Are all asterisms constellations?

A

NO

30
Q

Are all constellations asterisms?

A

YES

31
Q

Who created the first system for assigning numbers to the magnitude of stars?

A

Hipparchus

32
Q

Which is larger: parsec or light year?

A

Parsec

33
Q

What would a star that had a diameter 100 times larger than our sun be called?

A

A supergiant

34
Q

Does a low-mass star have less mass than our sun?

A

YES

35
Q

Do astronomers believe that black holes formed at the beginning of the universe and some remnants of supernovas?

A

YES

36
Q

What are most of the stars in our galaxy believed to be?

A

True binary stars

37
Q

Are globular clusters and open clusters held together by gravity?

A

NO

38
Q

According to the most popular view of what the first stars formed just after the Big Bang the new stars have formed many times since that event?

A

Stellar evolution