ASTR p2

The Great Red Spot of Jupiter has been observed since

**The basic energy source in the interior of the Sun is the nuclear energy derived from the fusion of

**Which of the following is a problem inherent to individual radio telescopes?

The temperature of the solar photosphere is about

The Zeeman effect describes what changes in spectral lines?

In general, the Jovian planets differ from the terrestrial planets in several important features. Which of the following is not one of these features?
(less dense, more massive, longer rotation periods, considerably larger in size)

What is the average length of time from one time of sunspot maximum on the Sun until the next time of sunspot maximum?

**Two forms of electromagnetic radiation that penetrate Earth's atmosphere are

Where are the main belt asteroids generally found in the solar system?

The light from the visible surface of the Sun comes from which atmospheric layer?

What natural barrier tries to prevent two protons from combining?

Asteroids associated with the Lagrange points in the orbit of Jupiter are called

The dark appearance of sunspots indicates that they are ______ the surrounding surface of the Sun.

**The four giant moons of Jupiter were discovered by

The only satellite in the solar system known to have a dense atmosphere is _________. It is one of the satellites of Saturn

Which of the following properties is constant for all types of electromagnetic waves?

**Which of the following is a problem inherent to individual radio telescopes?

**Which kind of process, as a net result, supplies the energy of our Sun?

Observation of the shift of a star's spectrum toward the red or the blue enables us to determine the star’s

Name the second most abundant element in the Sun.

Which of the following is one of the many contributions Galileo Galilei made to astronomy?

**Where are asteroids generally found in the solar system?

If you view a hot star through a cool cloud of gas, what sort of spectrum are you likely to see?

**The temperature of the solar photosphere is about

Adaptive optics are used to correct what problem?

**The amount of light reflected by a planet or other object is its

**The Zeeman effect describes what changes in spectral lines?

How was Uranus discovered?

Suppose you are at the Tropic of Cancer, which has a latitude of 23.5°. The altitude of the north celestial pole as seen from your position is:

The planet that rotates on its axis with a period almost identical to that of the Earth is

Suppose you see the Moon in the sky one evening. The next evening, it will have moved

In 1928 the International Astronomical Union divided the entire sky into ______ officially recognized constellations.

**What is the primary ingredient in the Earth's atmosphere?

Which of these is LEAST important to an astronomer for observing stars?

The absolute magnitude of a star is defined to be the apparent magnitude that the star would have if it were at a standard distance of ______ parsec(s).

The apparent magnitude of the Sun is about

Which of the following would be considered to be a correct spectral type and luminosity class for our Sun?

A parsec is defined as the distance to an object which has a parallax of _____ second(s) of arc.

A fifth-magnitude star is times brighter than a fifteenth-magnitude star.

If you view a typical star with a spectrograph, what type of spectrum are you likely to observe?

The luminosity of a star is a unique measure of its

Which of these is the greatest distance?

All F-type stars have approximately the same

The absolute magnitude of the Sun is about

**The spectrum of a typical gaseous nebula illuminated by an early B-type star is

An eighth-magnitude star is times brighter than a tenth-magnitude star.

A telescope of large aperture is better than one of small aperture because of

Which two ingredients are needed to make an emission nebula?

Stars which are just forming (protostars) radiate most of their energy and are most commonly detected in

**What is NOT thought to be approximately the same for each star in a cluster?

**What inevitably forces a star like the Sun to evolve away from the main sequence?

**What is the most important physical characteristic in determining the time that a given star spends on the main sequence?

**A galactic cluster is young if

The H-R diagram is a plot of

Another term for luminosity

Spectral type is based on...

**What inevitably forces a star like the Sun to evolve away from being a main sequence star?

Which of the following definitely does NOT agree with present theories of stellar evolution?

**A galactic cluster is young if

**What is the most important physical characteristic in determining the time that a given star spends on the main sequence?

**The spectrum of a typical gaseous nebula illuminated by a B-type star is

Which of the following are not intrinsic type variable stars?

If we know only the period for a Cepheid variable star, we can estimate its

A binary system cannot be seen as an eclipsing system if

Spectroscopic studies of Cepheids show that their changes in brightness are correlated with changes in

The masses of stars other than the Sun would be unknown without the study of

The distances to the nearby galaxies like M33 in Triangulum are based primarily on observations of the periods of the which can be seen in these nearer galaxies.

**Stars which are just forming (protostars) radiate most of their energy and are most commonly detected in

The variable star delta Cephei is a classic example of a/an

The type of intrinsic variable stars known as stars have periods ranging from a few hours to one day and are often found in globular clusters. They are sometimes referred to as cluster variables. They are often used to estimate distances to globular clusters.