___________ are created from dust clouds, when the cloud becomes agitated, it creates a mass of gas and dust? And Because of the turbulence, the mass collapses under its gravitational force.
What are stars?
100
These are dark regions on the photosphere of the sun.
What are sunspots?
100
The three different types of spectra include:
What are continuous, absorption, and emission spectra?
100
The diagram that illustrates the changes in a star during it's lifespan, and represents the color and absolute magnitude at different stages.
What is Hertzsprung-Russell Diagram.
100
This is how bright a star looks from Earth. (to those of us standing on Earth and looking at the stars)
What is apparent magnitude?
200
Gives a clue to a star's temperature.
What is the color of a star
200
The sun appears to be the brightest star in the sky because it is the __________ to the earth
What is the closest?
200
Which spectra is produced by a hot gas under low pressure?
What is emission spectra?
200
Name the way to measure the distance of a star.
What is parallax
200
Name the theory that states that the universe at one tiem was confined to a dense hot supermassive ball. Then about 13.7 billion years ago, a violent explosion occurred, hurling material in all directions.
What is the Big Bang Theory?
300
Mass, Luminosity, and Temperature (color) are the 3 main properties of these.
What are stars?
300
The sun produces energy by _________________
What is the nuclear fusion?
300
The spectra produced when visible light is passed through a cool gas under low pressure.
What is absorbtion spectra?
300
The life cycle of a star
What is a star begins as a nebula, spends much of it's life as a main sequence star, become red giants, plantetary nebulae, white dwarfs and finally, black dwarfs.
300
The actual brightness of a star, 10 parsecs away from the earth.
What is absolute magnitude.
400
These are the colors of the hottest and coldest stars
What are blue-ish white for hottest and red for coldest
400
From the sun's yellow color, you can infer that it is of average ____________________.
What is temperature.
400
The spectra produced by incandescent solid, liquid or gas under pressure.
What is contiuous spectrum?
400
Light-year
What is the distance light travels in one year, or 9.5 trillion kilometers.
400
It is an area in space where gravity is so strong that even light cannot escape from it. Since light cannot escape, it appears black.
What is a black hole
500
A stars brightness is related to its DISTANCE and its
What is temperature
500
What events related to the sun are very explosive, last about an hour, and produce a sudden brightening above a sunspot?
What are solar flares?
500
Name a similarity of the different types of spectra.
What is the colors are in the same order: violet, blue, green, orange, and red.
500
the type of stars that can be used to determine stellar mass.
What are binary stars? Binary stars are 2 stars orbiting around a common mass that are held together by the force of gravity.
500
A large spiral galaxy whose disk is about 100,000 light years wide and about 10, 000 light years thick at the nucleus.