Exam 18: The Universe

Gas and dust distributed among the stars is known as the _______________.

The stars of highest photospheric temperature are those of spectral class _______________.

When the Sun moves off the main sequence,it will next become a _______________.

The greater the mass of a star,the ______________ it moves through its life cycle.

When the term singularity is mentioned,the object under discussion is probably a

A Type II supernova can form a(n)______________ or a black hole.

The celestial prime meridian is an imaginary half-circle running from the north celestial pole to the south celestial pole and crossing perpendicular to the celestial equator at the point of the

A star of magnitude 1 appears _______________ times brighter than a star of magnitude 2.

Antiquity's greatest observer of stars was named

The brightest star (apparent magnitude -1)in the night sky in the Northern Hemisphere is named

Hubble's law is the major basis for the concept that the universe is

Which of the following is part of the Sun's structure?

Astronomers measure stellar distances in three different units.The smallest of these is

Astronomers believe that most of the matter that makes up the universe is not detected by any part of the electromagnetic spectrum.This mysterious matter is called ______________.

Sirius is a binary star,consisting of Sirius A and Sirius B.Sirius B is a

The letters LMC refer to the galaxy named _______________.

Another name for a pulsar is ______________.

An extremely large collection of stars bound together by gravitational attraction and occupying a huge volume of space is called a(n)______________.

One parsec is equivalent in distance to how many light-years?

The majority of stars are