The apparent path of the Sun upon the celestial sphere is called the ________. d

Question

The apparent path of the Sun upon the celestial sphere is called the ________. declination precession sidereal ecliptic parallax 2 points

QUESTION 32 Which one of the following statements is believed to be true of comets? Their bright, glowing appearance in the night sky is due to frictional heating in Earth's atmosphere. They are composed mostly of dense rock particles. They may gain slightly in mass with each orbit around the Sun. They have highly elliptical orbits around the Sun. 2 points

QUESTION 33 In the Ptolemaic (Greek) model of the universe, the ________. earth rotated on its axis to produce night and day Sun was in the center of the solar system earth was flat earth was in the center of the universe 2 points

QUESTION 34 Jupiter contains a number of small moons that are thought to be captured comets or material ejected by collisions with larger objects. What is the evidence for this theory? Analyses from spacecraft show they have compositions completely different than Jupiter or its moons. Their orbits are highly elliptical, off the plane of the ecliptic, and many are retrograde, which is unlikely for satellite formed during planetary accretion. Spacecraft have sampled them, and they are known to be comets. They are too big to have been formed during planetary accretion. 2 points

QUESTION 35 Which of these lunar features is the oldest? maria basins lunar highlands rayed craters like Copernicus lunar soil 2 points

QUESTION 36 The source of the Sun's energy is ________. chemical burning potential energy heat of contraction nuclear fusion nuclear fission 2 points

QUESTION 37 The layer of the Sun that radiates most of the light that reaches Earth is called the ________. corona chromosphere photosphere ionosphere megasphere 2 points

QUESTION 38 On a Hertzprung-Russell Diagram, our Sun is classified as ________. a yellow dwarf a yellow giant an average star a super star a mediocre star 2 points

QUESTION 39

A comet is visible because ________.

it is composed of white material, mostly ice it boils off steam that streams outward along the comet's path it is a small object, but it ejects gas and dust that at is dispersed by the solar wind to form a tail thousands of km long it is a very large object that get stretched out by interaction with the Sun's gravity 2 points

QUESTION 40

The first modern astronomer to propose a Sun-centered universe was ________.

Nicolaus Copernicus

Sir Isaac Newton

Galileo

Tycho Brahe 2 points

QUESTION 41 This scientist was the first to use the telescope in astronomy.

Galileo

Tycho Brahe

Nicolaus Copernicus

Sir Isaac Newton 2 points

QUESTION 42

Most of the Moon's craters were produced by ________.

faulting radial implosions

volcanic eruptions

the impact of meteoroids 2 points

QUESTION 43

A total eclipse of the Sun is only possible at ________.

second quarter

new moon

third quarter

first quarter 2 points

QUESTION 44 ________ refers to the bright head of a comet.

Lira

Coma

Toma

Lima

2 points

QUESTION 45

The densest stars known to exist are ________.

red dwarfs

neutron stars

black holes

white dwarfs 2 points

QUESTION 46

During a total lunar eclipse, the moon remains visible because ________.

the atmosphere of the moon diffuses light from the other side of the moon

the atmosphere of the earth refracts light around its perimeter

the earth is too far from the moon to totally cover the solar disk

None of the above; the moon completely disappears against the night sky. 2 points

QUESTION 47 Spiral galaxies tend to resemble a pinwheel because ________.

stars in the center of galaxy are moving more slowly than the ones on the outer edges.

stars in the center of the galaxy are moving faster than the ones on the outer edges

the barred structures form twisted pathways that distort the flow patterns the stars in the center are very old and large while the outer edges of the galaxy contain the youngest and smallest stars stars are moving from the center to the edges of the galaxy 2 points

QUESTION 48

Which of the following is not a Jovian planet?

Saturn

Pluto

Jupiter

Neptune

Explanation / Answer

The apparent path of the Sun upon the celestial sphere is called the elliptic. It is the  circular path on the celestial sphere that the Sun appears to follow over the course of a year.

32. They have highly elliptical orbits around the Sun. Orbit of a Comet. Comets go around the Sun in a highly elliptical orbit.

33.earth was in the center of the universe. The Ptolemaic (Greek) model assumed that the Earth was the center of not only the solar system, but the entire universe.

34. Their orbits are highly elliptical, off the plane of the ecliptic, and many are retrograde, which is unlikely for satellite formed during planetary accretion.

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