ASTR 151 Final Exam

Starting with the shortest wavelength of light, which of the following is the correct order of the electromagnetic spectrum?

The following questions describe methods for detecting companion star systems (binary stars) The possible choices are: Astrometric binary, eclipsing binary, optical double, spectroscopic binary, visual binary.
A/an ? is a visible star plus an unseen companion star. The presence of the unseen companion is inferred from variable proper motion of the visible star.

The blackbody radiation curve of a star with low surface temperature will peak at?

The different seasons on Earth are a consequence of

A certain star crosses your meridian at noon during the end of July. The sun obscures your view of this distant star during the daytime. When is the best time to observe this star?

The light gathering power of a telescope depends on?

Which of the following telescope projects will actually work?

Wien's law relates the peak wavelength of a blackbody to its surface temperature. Which is the correct relation?

Using the two figures below, which show the motion of stars A and B in the sky. Note that Star A is first visible above the horizon at noon. At what time will star B be located high in the NorthEastern sky?

A radio telescope is helpful because?

What is transported by a light wave

A light year is a measurement of

if you watch (or photograph) stars near the north celestial pole for a period of several hours, in what basic pattern do they appear to move?

The following questions describe methods for detecting companion star systems (binary stars) The possible choices are: Astrometric binary, eclipsing binary, optical double, spectroscopic binary, visual binary.
A/an ? can be resolved with a telescope so that two separate stars can be seen.

A person living at 70 degrees south latitude will live their entire lives without seeing stars whose declinations are

Using the two figures below, which show the motion of stars A and B in the sky. Note that Star A is first visible above the horizon at noon. In what direction is the observer facing in the diagram on the right?

what is the relationship between color and wavelength for light?

During the year, the Sun's apparent path against the background stars is called the?

The following questions describe methods for detecting companion star systems (binary stars) The possible choices are: Astrometric binary, eclipsing binary, optical double, spectroscopic binary, visual binary.
A/an ? is situated so that one star passes in front of its companion, cutting off light from our view at regular intervals.

Telescopes located on Earth (rather than in space) operate best in the following wavelength regions

In December the Northern Hemisphere is tipped ? the sun?

Use this figure and the method of stellar parallax to determine the distance from the sun to star A?

Assume there are two identical stars A and B. Star B is located 7 times farther away than star A. Star be will appear to be ? times fainter (dimmer) than star A.

A certain star is found to be 340 ly from the Earth. Expressed in parsecs, the distance is approximately?

At what time will Star B be located high in the NorthWestern sky?

The band of stars around the sky that is centered on the apparent annual path of the sun is called the?

Refer to the following figure. The season in the Northern hemisphere at Position A is

The following five questions describe methods for detecting companion star systems (binary stars). The possible choices are: astrometric binary, eclipsing binary, optical double, spectroscopic binary, visual binary.
A/an ? cannot be resolved in a telescope. Its binary nature is revealed by its spectra.

Short wavelength visible light

From any location on Earth, the zenith defines a direction

Where would you have to be to see the north celestial pole directly over your head (ie your zenith)?

The phenomenon of the parallax is the?

Us the figure below as an example of blackbody radiation curves for five different stars. Determine which of the following statements is true.

in the system of celestial coordinates that matches latitude and longitude upon Earth, which is the coordinate that is equivalent to longitude?

Which of the following is not a physical unit of length

If you could see stars during the day, the drawing below shows what the night sky would look like at noon on a given day. The sun is near the stars of the constellation Gemini. Near which constellation would you expect the Sun to be located at on sunrise of this day?

Refer to the following table 1.1 given the following choices which star has the hottest surface temperature?

Using the two figures below, which show the motion of stars A and B in the sky. Note that Star A is first visible above the horizon at noon. At what time would you see Star A high in the Southern part of the sky?

The doppler shift of a stars spectral lines can tell us something about its ?

how much more light is collected by a telescope with a mirror that is 30 meters in diameter compared to a telescope with a 10 meter mirror

The Sun and the stars appear to rise in the East and set in the West each day, however, it is actually Earth that is moving. Which motion is responsible for this appearance of the sky?

The following questions describe methods for detecting companion star systems (binary stars) The possible choices are: Astrometric binary, eclipsing binary, optical double, spectroscopic binary, visual binary.
A/an ? is a pair of stars that appear to be close to each other in the sky as viewed from Earth but are really not close to one another and have no physical relationship.

For the star in the previous problem, what color does it appear?

Identify the basic order of the Scientific method

In the system of celestial coordinates that matches latitude and longitude upon the Earth, which is the coordinate that is equivalent to latitude?

All forms of light have what property in common?

Last night you saw the star named Deneb exactly on your Western horizon at 650 PM. At 650 Pm tonight where will Deneb be?

If a star is twice as hot as the sun, then this star will radiate ? times more energy than the sun. Hint recall the stefan-Boltzman law.

In Science, if new and reliable observations disagree with a particular theory, then the

In the previous problem, which physical law did you use to answer the question