ASTRONOMY Q1
the study of the universe?
astronomy
earth spinning on its axis
rotation
Planet closest to the Sun and has the shortest revolution period
mercury
3rd planet from the sun
earth
a celestial body of hot gases that radiates energy derived from solar fusion reactions in the interior
star
How long it takes for the earth to orbit around the sun?
1 year/ 365 days
A natural satellite of a planet. inner planets have few _____ and outer planets have many _____.
moon
Also called the red planet and is composed of a lot of iron oxide
mars
first four planets closest to the sun - inside the asteroid belt
inner planets
Occurs in the core of the sun when hydrogen atoms fuse to make helium and enormous amount of energy is released.
solar fusion
how long it takes earth to rotate once on its axis?
24h/ 1 day
A force of attraction between objects that is due to their masses
gravity
Largest planet in our solar system and has a giant red spot caused by low pressure storms
Jupiter
balls of ice, rock, and dust in space with a tail
comets
Jupiter, Saturn, Uranus, and Neptune . These planets have relatively low densities and are huge gas giants
jovian planets
Earth's yearly orbit around the Sun
revolution
the regular rise and fall of the ocean's surface influenced by the moon's gravity pulling on earth
tides
earths twin planet
venus
rocky metallic objects that orbit the sun but are too small to be considered planets
asteroids
A streak of light in the sky produced by the burning of a meteoroid in Earth's atmosphere from friction due to air resistance; also called shooting stars
meteors
Distance light travels in one year.
light year
Occurs when the Moon passes directly between the Sun and Earth and casts a shadow over part of Earth
solar eclipse
An eclipse where the Earth comes between the Sun and the Moon and it is a full Moon
lunar eclipse
A loose grouping of asteroids and meteors between the orbits of Mars and Jupiter
asteroid belt
a region of the solar system that starts just beyond the orbit of Neptune and that contains dwarf planets and other small bodies made mostly of ice
kuipter belt