Earth Science- Chapter 23 BJU

an ancient model of the solar system that placed Earth at its center and the sun with the planets orbiting around it

What are the Apollo Asteroids?

astronomical body that orbits the sun, has enough mass to be a sphere, and enough gravity to clear its orbit of objects

What is Luna (Earth's Moon)?

According to the Ptolemaic geocentric theory, all stars are the same distance from earth.

All the inferior planets lack moons.

the sun and all the planets and other objects its gravity holds in orbit around it

All the terrestrial planets exhibit solar transits.

Planets stay the same distance from the sun as they orbit it.

a planet about the same size and density as Earth, one of the inner planets (Mercury, Venus, Earth, or Mars)

rocky object in orbit around the sun that meets the IAU definition of a SSSB, but is too small to be observed from Earth

a SSSB in orbit around the sun made of rock and ices that, and when close enough to the sun forms a coma and tail.

Pluto is not a planet.

What is a meteorite?

a natural satellite of a planet

a planet similar in size and composition to Jupiter, one of the outer planets (Jupiter, Saturn, Uranus, or Neptune)

rocky object in orbit around the sun that meets the IAU definition of a SSSB, and is large enough to be seen from Earth

Asteroids are so small at they don't exert any detectable gravity.

What is Halley's Comet?

a geometric figure that appears as a flattened circle, and is constructed from two points called foci

a meteor large enough to have survived the fall through the atmosphere and hit the ground

What is Mercury?

space object that orbits the sun & has enough mass to be a sphere, but not enough gravity to move objects from its orbit

What is Ceres?

any astronomical object in the solar system that doesn't meet the IAU definition of a planet or dwarf planet

A meteor is a meteoroid that has entered Earth's atmosphere.

What is Pluto?

a model of the solar system that places the sun at its center, with the Earth and other planets orbiting around it.

Comets are visible to the unaided eye only when they're in the inner solar system.

What is Titan?

All the superior planets have moons

a meteoroid that falls through the Earth's atmosphere and heats up until it glows

the regular elliptical path one astronomical body takes around another

The heliocentric theory of the solar system was simpler than Ptolemy's system, but still had some of the same problems.