Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
22 Cards in this Set
- Front
- Back
Big Bang Theory
|
The theory that all matter and energy in the universe was compressed into a very small volume that 13 to 15 billion years ago exploded and started expanding in every direction.
|
|
Galaxy
|
A collection of stars, dust, and gas bound together by gravity.
|
|
Milky Way
|
A spiral galaxy which contains the solar system which contains Earth.
|
|
Light Year
|
The distance that light can travel in one year.
|
|
Prominence
|
A loop of relatively cool, incandescent gas that extends above the photosphere and above the sun's edge as seen from Earth.
|
|
Solar Nebula
|
A rotating cloud of gas and dust from which the sun and planets formed; also any nebula from which stars and exoplanets may form.
|
|
Corona
|
The outermost layer of the sun's atmosphere.
|
|
Supernova
|
A stellar explosion that is more energetic than a nova.
|
|
Black Hole
|
An object so massive and dense that even light cannot escape it's gravity.
|
|
Neutron Star
|
A star that has collapsed under gravity to the point that the electrons and protons have smashed together to form neutrons.
|
|
Main Sequence Star
|
A star that lies on the diagnol band on the H-R diagram.
|
|
Red Shift
|
It's when the light coming from an object is stretched out to the very most.
|
|
Nuclear Fusion
|
The process in which two hydrogen's fuse to make helium giving off heat and light.
|
|
Solar System
|
It's a group that consists of a star, rocks, and planets that was formed 4.6 billion years ago in the Milky Way Galaxy.
|
|
Planetesimal
|
It's the stage of when a cloud of cosmic dust grains collide together and form a larger body.
|
|
Solar Wind
|
A stream of charged particles that is from the outer atmosphere of the sun.
|
|
Solar Flare
|
An eruption on the Sun's surface from sunspots that can interrupt Earth's electronics.
|
|
Sunspot
|
A cooler and darker spot on the Sun's surface that occur on an 11 year cycle.
|
|
Photosphere
|
It's one of the outer layers of the sun that most people on Earth see everyday.
|
|
Aurorae
|
It's a light show that happens in the poles that occur when the solar flares reach Earth and the particles go into the atmosphere.
|
|
Red Giant
|
A stage in a star's life that occurs when a star runs out of hydrogen to fuse and then fuses helium.
|
|
White Dwarf
|
The last stage in a regular star's life when the star runs out of everything to fuse and shrinks down to the size of the Earth.
|