The positions of the constellations appear to change through out the year because ________________?
What is Earth's revolution around the Sun?
100
A main sequence star becomes a _______after it uses up the hydrogen in its core.
What is giant?
100
The Sun produces energy by fusing hydrogen into ____________ in its core.
What is helium?
100
The intense magnetic field associated with Sunspots may cause huge arching columns of gas called___________________.
What is prominences?
100
The distances to nearby stars can be measured by using __________________.
What is parallax?
200
Our Sun is all of the following Except _____________.
A. part of a binary system
B. a main sequence star
C. a yellow star
D. of average absolute magnitude
What is A. part of a binary system?
200
An object so dense that nothing can escape its gravity field.
What is a black hole?
200
Its___________________makes Sirius the brightest star in the night sky.
What is apparent magnitude?
200
Dark, cooler areas on the the Sun's surface.
What is Sunspots?
200
The coolest stars in the sky are in the color ___________.
What is red?
300
A star's core collapses and its outer portion explodes producing a ______________.
What is supernova?
300
About 90 percent of all stars are ________ stars.
What is main sequence?
300
Gases near a sunspot that brighten up suddenly and erupt.
What are solar flares?
300
Earth's atmosphere radiates lights called the ___________
_________
What is aurora borealis?
300
The __________is the closest star to the Earth.
What is Sun?
400
A region of gas and dust where stars form.
What are nebula?
400
The distance that light travels in one year.
What is a light-year?
400
The hottest stars in space are in the color _________.
What is blue?
400
A diagram that shows the relationship of a star's temperature to its absolute magnitude.
What is a H-R diagram?
400
The stage in a star's evolution when it contracts and its outer layers escape into space and leaves behind the hot, dense core.
What is white dwarf?
500
This is so dense that a teaspoonful would weigh more than 600 million metric tons in Earth's gravity.
What is a neutron star?
500
One way the Sun is unusual compared to other stars.
What is not close to any other stars?
500
The largest layer of the sun's atmosphere.
What is corona?
500
Often called the surface of the sun.
What is photosphere?
500
This is an average star. It is middle-aged and its absolute magnitude is about average.