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Ch. 22 Stars and Galaxies

Terms in this set (24)

Which shows the evolution of some massive stars in the correct order?
nebula, protostar, supernova, neutron star
A _____ is a huge collection of stars.
galaxy
Where do stars form?
in a cloud of gas and dust called a nebula
The distances to nearby stars can be measured by using _____.
parallax
What is solar wind?
charged particles streaming away from the Sun
A sequence of star colors from hottest to coolest is _____.
blue, yellow, orange, red
What is a black hole?
an object whose gravity is so great that no light can escape
_____ are patterns of stars in the sky
Constellations
The hottest stars in space are _____ in color.
blue
Which best describes the location of our solar system?
in a galaxy called the Milky Way, which is part of a cluster of galaxies called the Local Group
Imagine that the Sun became suddenly much brighter. Based on the scale shown, which of the following would be a possible apparent magnitude for the Sun after the change?
-40
A measure of the amount of the light given off by a star is its _____.
absolute magnitude
Two stars orbit each other in a(n) _____ star system.
binary
A _____ is a region so dense that nothing, including light, can escape its gravity field.
black hole
Dark, cooler areas on the Sun's surface are called _____.
sunspots
At the end of a star's life cycle, it releases gas into space that can be recycled into new stars.What do scientists call the area or cloud of recyclable materials?
planetary nebulae and supernova remnant
_____ is the apparent shift in the position of an object when viewed from two locations
parallax
A _____ is a region of strong magnetic activity on the photosphere the Sun.
sunspot
A group of stars, gas, and dust held together by gravity is a _____.
galaxy
A galaxy that has a shape similar to a football is a(n) _____ galaxy.
elliptical
Its _____ makes Sirius the brightest star in the night sky
apparent magnitude
The coolest stars in the sky are _____ in color.
red
Which stars are the coolest?
super giants
The _____ states that between 15 and 20 billion years ago, the universe began expanding out of an enormous explosion.
Big Bang theory
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