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Unit 2 Space Science

DefinitionTerm
about 14 billion years ago, a violent explosion occurred, creating the Universe (just dust and gas). Energy from this explosion is still measurable as cosmic background radiation The Big Bang Theory
a cloud of gas and/or dust in space (from big bang or exploding star) galaxies, stars and planets form from this Nebular Theory
a group of stars, planets and rocks held together by gravity. We live in a spiral one called the Milky Way. Galaxies
a star that has celestial bodies (planets, moons, asteroids, comets) gravitationally bound to it. Solar Systems
What is the name of our star? The Sun
Responsible for pulling material, dust and gas, together in space to form galaxies, stars and planets Allowed planets and other objects to orbit, go around, a star. Gravity
Heavier objects create more gravity. Direct Relationship
Objects that are closer have..... more gravity between them.
fusion takes place here core of the sun
produces the sun's magnetic field Convection Zone
(not solid) radiates light and heat into space. Photosphere
outermost layer of sun Corona
turns Hydrogen into Helium (lighter elements into heavier ones) releasing Energy. Nuclear Fusion
What is happening to the amount of hydrogen in the sun? The amount of hydrogen in the sun is decreasing, there will be no fuel and life will go extinct.
cooler areas of the sun causing a dark spot on the surface Sunspots
maximum numbers maxima
minimum numbers minima
sudden releases of electromagnetic energy into space. Creates electromagnetic "disturbances" on Earth. Solar Flares
a continuous stream of charged particles released from the Sun Solar Wind
What is responsible for protecting Earth from solar winds? The magnetic field
Created by: user-1901406
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