Stars
A high-mass star that explodes after using up its fuel
What is a supernova
The actual brightness of a star
absolute magnitude
What can happen after a medium-mass star becomes a white dwarf?
It can become a nova
The Milky Way Galaxy is a ______ galaxy.
What is a spiral galaxy?
The first person in space
A white-dwarf star that briefly becomes thousands of times brighter than normal
What is a nova?
The ________ of a star determines how much gas it has.
What is mass?
Electromagnetic radiation is _________ released in waves in the form of radio waves, infrared rays, visible light, ultraviolet waves, x-rays, and gamma rays.
What are nebulas?
In our solar system, the object with the greatest gravitational pull also has the greatest _________.
What is mass?
The first man on the moon
Who is Neil Armstrong?
Dark cloud of gases and dust in space, where stars are formed
What is a nebula?
The more mass a star has, the _________ it burns out (dies).
Faster
The only part of the electromagnetic spectrum can our eyes can see
What is visible light?
Gravity gathers large systems of stars together in groups called ___________.
What are galactic clusters?
The first nation to put a man on the moon
What is the United States?
Joining of the nuclei of atoms; the process that fuels stars
What is fusion?
__________ causes part of nebulas to come together, forming dense centers called protostars.
What is gravity?
List the stages in the life cycle of a low-mass star
nebula, protostar, main sequence star, white-dwarf
How galaxies are classified
What is shape?
A competition between the United States and the Soviet Union to have the best space program and, ultimately, send a man to the moon.
What is the "Space Race"?
Type of star accounting for 90% of the stars on the H-R diagram
What is a main-sequence star?
Why might a bright star may appear dimmer than a dim star?
because it is further away
List the color of stars in order HOTTEST to COOLEST:
Blue, yellow, red
List the four types of galaxies.
spiral, irregular, barred spiral, elliptical
Explain the difference between a reflecting telescope and a refracting telescope.
Refracting uses glass lenses to magnify objects.
Reflecting telescopes uses mirrors to magnify objects.