Astronomy
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| galaxy | great island of stars in space
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| Milky Way | galaxy in which our solar system resides
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| Local Group | a group of galaxies
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| galaxy clusters | galaxies with more than a few dozen members
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| super cluster | a region of tightly packed galaxies
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| universe | the sum total of all matter and energy
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| expanding | average distances between galaxies increase with time
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| Big Bang | the beginning of expansion - 14 billion years ago
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| Shape of Orbits | Elliptical
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| What type of objects orbit. | Smaller objects orbit bigger objects. Planets, comets, asteroids and meteoroids orbit the sun. Moons orbits planets or dwarf planets.
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| speed of light | 300,000 km per sec
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| light year | distance light travels in a year - 6 trillion miles
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| fact of light | the farther away we look in distance, the further back we look in time
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| Orion Nebula | a giant cloud in which stars and planets are forming
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| Closest Galaxy | Magellanic Cloud
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| age of universe | 14 billion years
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| observable universe | the portion of the universe that we can observe
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| definition of planet | 1) orbits around a star
2) round shape
3) clear neighborhood around orbit
4) Is not a moon
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| number of stars | more than 100 billion
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| Objects don't leave their orbit because | the gravity between the object and the object being orbited.
Example: Star and Planet
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| astronomical unit | Earth's average orbital distance - 93 million miles
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| Objects don't crash into the object they orbit because | the orbiting object's inertia
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| Inertia is | Is caused by having mass and is the tendency of an object to resist a change in motion.
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| Closest star to Earth besides our Sun | Proxima Centauri
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| Regions in our solar system | Inner planets, asteroid belt, outer planets, Kuiper Belt, Oort Cloud.
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| As you move farther from an object it's size becomes but the actual size doesn't change. | Smaller.
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| Comets | Made of frozen gases, rock and cosmic dust. Located in the Kuiper belt and Oort Cloud. Range in size from 5km-100km
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| Asteroids | Made of rock, iron, nickel, clay, silicate, stone. Range from 10m to 530km. Found mostly in asteroid belt located between Mars and Jupiter.
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| Meteor | Bright streak of light in the atmosphere of a planet or moon caused from a meteoroid burning up due to air resistance. Range in size to less to 10m and made of rock, iron , nickel, clay, silicate and stone.
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| Meteorite | Made of rock, iron, nickel, clay, silicate, stone. Vary in size but usually less than 10m. Found on the surface of a planet or moon.
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| Meteoroid | Made of rock, iron, nickel, clay, silicate, stone. Vary in size but less than 10m because come from asteroids. Found throughout our solar system.
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Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
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If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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Created by:
sgw005
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