Planets of Our Solar System
How was Edwin Hubble?
Astronomer Edwin Hubble was the first scientist to study galaxies, in the 1920s.
What star is the hottest?
Blue stars are the hottest stars
gas giants or outer planets
Jupiter, Saturn, Uranus, and Neptune
order of the planets from the Sun
Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune
terrestrial or inner planets
Mercury, Venus, Earth, and Mars
Our solar system is in what galaxy
Milky Way Galaxy.
Venus
Second planet from the Sun, but is the hottest because it has a thick atmosphere which traps heat.
Earth
Third planet from the Sun. Has atmosphere which sustains life.
galaxy
a group of billions of stars, objects that orbit those stars, gas, and dust
asteroid belt
a large group of small celestial objects composed of rock and metal that move around the sun between the orbits of Mars and Jupiter
planet
a large, round body that revolves around a star
moon
a natural satellite that revolves around a planet.
dwarf plant
a nearly round body, slightly smaller than a planet, whose orbit crosses the orbit of another body.
meteorite
a piece of meteor that lands on Earth instead of burning up in Earth's atmosphere.
comet
a small body of ice, rock and gas orbiting the Sun in long, oval paths
space Probe
a spacecraft that gathers data without a crew
solar system
a star and all the planets and other and other bodies that resolve around it.
telescope
an instrument used to make distant objects appear nearer.
satellite
any body that orbits another
What is a Meteoroids?
are pieces of asteroids that break off; meteorites are meteoroids that reach Earth.
asteroid
chunks of rock and iron that orbit the Sun; most are found between Mars and Jupiter
Mercury
closest planet to the Sun. Very hot rocky planet. tSmall quickly moving planet.
universe
everything that exists, including galaxies and everything in them
rocky planets
group of four planets in our solar system formed when the Sun melted ice particles creating rocky dense planets.
stars
huge balls of very hot, glowing gases in space that produce their own light and heat
What is a Comet?
is a chunk of frozen gas, dust, ice, and rock.
What is the universe made of?
is made up of everything that exists.
What is Astronomy?
is the study of space and everything in it.
Neptune
last planet in the solar system and the fourth gas giant. Windiest planet in the solar system.
What is a Asteroids?
objects made of rock and iron, may be as small as a city block or a large as an ocean.
gas giants
planets farther from the Sun's heat where ice particles combined with gas creating larger lighter planets.
Mars
red planet with rust on the surface causing the red glow. Fourth planet from the Sun.
Uranus
seventh planet from the Sun third gas giant. Has strange rotation which is top to bottom.
Saturn
sixth planet from the Sun. Second of the gas giants with seven large shining rings.
Jupiter
the first of the gas giants and fifth planet from the Sun. Largest planet in the solar system. Has great red spot which is a storm.
orbit
the path one body takes in space as it revolves around another body
year
the period of 365 1/4 days required for the Earth to make on complete revolution around the sun
rotation
the spin on an axis
astronomy
the study of objects in space and their properties
What size is the sun and color?
the sun is a medium-sized and yellow star
What is a galaxy made of?
they are made up of billions of stars, objects, gas, and dust held together by gravity.
tilt
to move or shift so as to tip
