Advertisement Upgrade to remove ads

Space Science flashcards for chapters 16 and 17

The geocentric model of the solar system is attributed to

Aristotle.

The heliocentric model of the solar system was developed by

Copernicus.

Kepler's second law of planetary motion is known as the law of

equal areas.

That a planet moves with different speeds in its orbit is given by which of Kepler's laws?

Second

Kepler's first law states that the orbits of the planets around the Sun are

ellipses.

The name given to the point of a planet's orbit that is closest to the Sun is

perihelion.

The name given to the point of a planet's orbit that is farthest from the Sun is

aphelion.

Kepler's third law of planetary motion is also known as the ____________ law.

Harmonic

Retrograde motion of a planet refers to ___________ motion.

east-to-west

Earth's axis is tilted ______ degrees from the normal to the ecliptic plane.

23.5

The motion of a Foucault pendulum proves that earth is

rotating.

The closest planet to Earth is

Venus.

The planet Mercury is the smallest of the terrestrial planets.

...

The aberration of starlight gives proof that Earth is

revolving.

Which planet moves the fastest?
A. Earth
B. Mars
C. Venus
D. Mercury

Mercury

The terrestrial planets have relatively high densities, solid surfaces, and weak magnetic fields.

...

According to today's classification system, how many major planets are there in the solar system?

8

How many minor planets are known to exist in the solar system, using today's classification system?

3

The third brightest object in the sky is

Venus.

The second brightest object in the sky is

the Moon.

The brightest object in the sky is

the Sun.

A terrestrial planet that has seasonal changes is

Mars.

The Jovian planets are composed of mainly hydrogen and helium, have no solid surfaces, and all have rings.

...

The terrestrial planets and the Jovian planets are distinguished from each other in terms of

density, size, and temperature.

The most distant planet that can be seen with the unaided eye is

Uranus.

The planet whose axis of rotation lies almost in its orbital plane is

Uranus.

The planet with the Great Red Spot is

Jupiter.

The largest planet in the solar system is

Jupiter.

The planet with Red Spot Junior is

Jupiter.

The planet with a hexagonally shaped storm at its pole is

Saturn.

The planet with the Great Dark Spot is

Neptune.

The planet with the largest number of moons is

Jupiter.

The planet with the most prominent rings is

Saturn.

The planet with the largest volcano in the solar system is

Mars.

Which of the following is not a dwarf planet?
A. Ceres
B. Mercury
C. Pluto
D. Eres

Mercury

Which is the smallest dwarf planet?

Ceres

The three smallest major planets in the solar system all lack

a moon.

The flattened, rotating disk of gas and dust around the protosun, from which planets were believed to have formed, is called the

solar nebula.

At present, the formation of the solar system is believed by most astronomers to have begun with a large, swirling volume of cold gas and dust called the __________ nebula.

primordial

True or False? Planets in a planetary system other than the solar system have been detected.

True

Other planetary systems are best detected by the Doppler shifts that change the pattern of the star's __________.

spectrum

The solar system is a complex system of moving masses held together by ______________ forces.

gravitational

The dominant mass of the solar system is the _________.

Sun

Kepler's first law states that Earth's orbit around the Sun takes the shape of a(n) ____________.

ellipse

The solar system model of Copernicus is known as the _______________ model.

heliocentric

The Earth-centered model of the solar system is called the ___________ model.

geocentric

T2=KR3 is known as ___________.

Kepler's third law

Kepler's first law of planetary motion is known as the law of ___________ paths.

elliptical

The distance between the Earth and the Sun is 93,000,000 miles, or one _____________.

astronomical unit (AU)

Kepler's second law of planetary motion gives a relationship concerning equal _________ in equal periods of time.

areas

When a planet has the same meridian as a star, the planet is said to be in _____________.

conjunction

The fraction of incident sunlight reflected by a celestial body is called its ______________.

albedo

Earth's albedo is ____________.

0.33, or 33%

The Moon's albedo is _____________.

0.07, or 7%

In 1851, Earth's rotation was demonstrated using a(n) __________________.

Foucault pendulum

_______________ is the apparent motion that occurs between two fixed objects when the observer changes position.

Parallax

The apparent displacement in the direction of light coming from a star because of Earth's orbital motion is called the ________________.

Aberration of starlight

Proof that the Earth revolves around the Sun is obtained by the use of ________________ and the _________________.

parallax; aberration of starlight

The fourth planet from the Sun is

Mars.

The planet that most resembles Earth is

Mars.

The surface of the terrestrial planet __________ cannot be seen from Earth.

Venus

"Canals" are a feature once associated with the planet

Mars.

The largest volcano on Earth is

Mauna Loa.

The planet with the polar "ice caps" of frozen carbon dioxide is

Mars.

Part of Pluto's orbit is inside the orbit of

Neptune.

The planets with known rings are

Saturn, Neptune, Uranus, and Jupiter.

The planet that contains more than half the mass of the solar system not in the sun is

Jupiter.

The Great White Spot is a feature of

Saturn.

The rings of Saturn were discovered by

Galileo.

The planet _____________ has retrograde motion.

Uranus

The planet that is farthest away from the Sun, but sometimes is not, is

Pluto.

The large, central portion of a swirling solar nebula is called a(n)

protosun.

Our solar system is thought to have evolved from a(n)

solar nebula.

"Wobbling" is a consequence of _______________ effects of a planet.

gravitational

The _____________ effect provides evidence of motions within other planetary systems.

Doppler

What percentage of the total mass of the nine planets exists in Jupiter?

77%

Which is the second largest moon in the solar system and what planet does it belong to?

Titan, Saturn

The major moons of __________ were named after literary characters.

Uranus

__________ is the major moon of Neptune.

Triton

__________ is the only moon in the solar system to have retrograde motion.

Triton

Charon is a moon of

Pluto.

The largest known asteroid is

Ceres.

When a meteoroid enters Earth's atmosphere, it is called a(n)

meteor or "shooting star"

When a meteor strikes Earth's surface, it is called a(n)

meteorite

The seriousness of an asteroid collision is gauged by the _________ scale.

Torino

A meteor __________ results when a large number of meteoroids enter Earth's atmosphere.

shower

The ________ surrounds the nucleus of a comet.

head or coma

Comets are composed of

dust and ice.

Probably the best known comet is

Halley's Comet.

Halley's Comet returns about every ___ years.

76

As comets approach and move around the Sun, the coma and the tail _________ in size.

increase

Long-period comets are believed to come from

the Oort cloud.

Short-period comets, such as Halley's comet, are believed to come from

the Kuiper Belt

Particles of interplanetary dust are called

micrometeoroids.

If a person weighs 150 lb on Earth, what will the person weigh on the Moon?

25 lb

The diameter of the Moon is approximately

2200 mi.

True or False? The far side of the Moon has more craters than the near side.

True

Pulverized rock is believed to make up the Moon's

rays.

Moonquakes are believed to have caused the Moon's

rills.

The Moon is thought to be the same age as

the Earth.

Craters on the Moon are believed to have been caused by

the impact of meteorites.

The impact of meteorites on the Moon has caused

rays and craters.

The oldest rocks on the Moon were formed about how many years ago?

4.4 billion

The Moon's average density is

less than Earth's.

Rills on the Moon are believed to have been caused by

moonquakes.

The moon revolves about Earth from west to east, has a day equal to 29.5 Earth days, and has an elliptical orbit about the Earth.

...

The Moon completes one orbit around the Earth about every

29.5 days.

The direction of the Moon's orbit about the Earth is

eastward.

The Moon revolves around the Earth in a _______ direction, as viewed from above Earth's North Pole.

clockwise

Which is Jupiter's largest moon?

Ganymede

Which of the Galilean moons has volcanic activity?

Io

Which of Jupiter's moons is believed to be covered with water ice?

Europa

Please allow access to your computer’s microphone to use Voice Recording.

Having trouble? Click here for help.

We can’t access your microphone!

Click the icon above to update your browser permissions above and try again

Example:

Reload the page to try again!

Reload

Press Cmd-0 to reset your zoom

Press Ctrl-0 to reset your zoom

It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.

Please upgrade Flash or install Chrome
to use Voice Recording.

For more help, see our troubleshooting page.

Your microphone is muted

For help fixing this issue, see this FAQ.

Star this term

You can study starred terms together

NEW! Voice Recording

Create Set