what kind of star becomes a giant when fusion slows down, the outer atmosphere of the star expands, luminosity increases, and the star begins to fuse helium into carbon?
a low-mass star
100
Two stars orbit each other is known as a _______.
Binary star system
100
Which galaxy has a sphere shaped
Elliptical
200
the collection of large and small bodies that orbit around our central star is called ___________.
The solar system
200
The measure of a star's brightness as seen from Earth is called _______.
Apparent magnitude
200
what are two possible objects that are left behind by a high mass star at the end of its life-cycle?
neutron star and black hole
200
which galaxy has a spiral shape?
spiral
300
The spherical body that orbits the sun is called a ______________________.
planet
300
The measure of how bright a star would be if the star were located at a standard distance is called ________.
Absolute magnitude
300
what is the first thing that happens in the life cycle of a low-mass star?
Nuclear Fusion stops
300
What are the different parts that make up an universe?
existing energy, matter and space
300
Which galaxy has no shape?
Irregular
400
a collection of gas and dust is called ________?
Galaxy
400
Which color represent the hotter stars?
Bluish-white
400
True or False: The Universe is larger than a galaxy
True
400
Name a planet that is part of the Giant gas planet
Answer will vary
400
What is the name of Earth's galaxy?
Milky way
500
Space and all the matter and energy in it is called _____________.
Universe
500
Which color represent the cooler stars?
Red
500
An Astronomer uses a telescope to observe a star. He observed that the color of this star is similar to the sun. He infers that the sun and star have the same size and shape. What is the size of the sun and star?