|asteroid small, rocky
body that orbits the sun. Most are located between Mars
and Jupiter in a region called an asteroid belt; also
of celestial bodies, what they are made of and their
magnitudes and motions.
gases that surround a planet or moon, held in place
by the force of gravity.
line through poles of a planet, about which it rotates.
comet body of ice
and dust in orbit around the sun that develops a tail
of ions and dust as it approaches the sun.
outer part, visible as a halo during a total solar eclipse
around the edge of the moon.
hole on a surface made by a volcanic explosion or the
impact of a body such as a meteoroid.
of an object?s mass in relation to how much space
caused by one body casting a shadow on another. A solar
eclipse occurs when the moon passes between the sun
and Earth, casting a shadow on Earth. A lunar eclipse
occurs when Earth passes between the sun and the moon,
casting a shadow on the moon.
gas giants largest
four planets in the solar system (Jupiter, Saturn, Uranus,
and Neptune) made largely of dense gaseous atmosphere.
theory that Earth is the center of the solar system.
gibbous phase when
a moon or planet shows more than half, but not all,
of its face.
force of attraction felt between two or more objects
that the sun is in the center of the solar system.
part of light, with longer wavelengths that are felt
as heat radiation.
light travels in a vacuum in one year, approximately
5.88 trillion miles
field of a planet.
mass measure of
the amount of matter an object contains, not dependent
meteor mass of
rock or metal that enters Earth?s atmosphere,
usually burning up before reaching the planet?s
of rock or metal that has survived friction of Earth?s
atmosphere to reach the surface.
and debris that travel through space and become meteors
when they enter Earth?s atmosphere.
meteor shower large
number of meteors burning upon entering Earth?s
atmosphere, occurring when Earth?s orbit passes
through debris from a comet.
moon natural satellite
of a planet.
of stars, or a cloud of dust particles and gases.
orbit path followed
by a star, planet, or satellite around a more massive
and lighter part of the shadow created by an eclipse.
phase size of the
illuminated portion of a planet or moon.
pole end of an
axis, or the point where an axis meets the surface of
a planet (geographic); either end of a magnet and points
where the magnetic forces originate (magnetic).
body that orbits a star.
around a center or an axis, or to turn in a circle.
object, natural or artificial, that orbits a larger
solar flare explosion
on the sun?s surface causing a flaming arch millions
of miles long, due to a shift in the sun?s magnetic
solar system planets
and bodies that orbit the sun and any group comprising
a central star and orbiting planets.
solar wind stream
of charged particles emitted from the sun.
and slightly cooler region on the surface of the sun,
created when powerful magnetic fields stop the circulation
planets in the solar system, made primarily of rock.
radiation, or energy, that has a wavelength shorter
umbra dark central
zone created by an eclipse.
volume amount of
space an object occupies.
wane decrease in
the phase of a moon or planet.
wax increase in
the phase of a moon or planet.