ASTR Quizzes (Timed)

Which objects are listed in order from smallest to largest?

A light year is a measure of

Proxima Centauri, the nearest star outside of our solar system, is about _______ times farther away from the Sun than Pluto.

The ________ is the totality of all space, time, matter and energy.

What is the object pictured below?

Ten million is the number 10 raised to what power?

Which objects are listed from the closest to earth to the farthest from earth?

An astronomical unit is defined as the distance between _____________.

We live in the _________ galaxy.

What is the name of the brightest star in the night sky.

Of the apparent visual magnitudes listed below, which corresponds to the faintest star in our sky that can still be seen with the naked eye?

The Big Dipper is the name of ____________.

Consider the diagram of the earth at the center of the celestial sphere with the north pole marked NP. Which letter represents the celestial equator?

Where is the north celestial pole as viewed from Los Angeles?

The imaginary boundary between the earth and sky is called the __________.

Constellations that do not set and are always above our horizon are called ___________ constellations.

The point in the sky directly above any observer on the earth is called the ______________.

What is the angle between the earth's equator and the plane of the earth's orbit around the sun?

Why is it summer in Los Angeles during June?

The changing position of the North Celestial Pole over a 26,000 year period is due to the Earth's ____________.

The apparent path of the sun on the celestial sphere is called the _______.

The point on the sun's path farthest south is called the _________.

During which of the following days will the sun rise due east?

A system of assumptions and principles applicable to a wide range of phenomena that have been repeatedly verified is called a ______________.

Galileo discovered that Jupiter has ___________.

The apparent backward motion of a planet as seen against the background of stars is called ___________ motion.

Which of the following were contained in both Ptolemy and Copernicus's models of the solar system.

used his universal law of gravity to explain planetary motions.

made geocentric model of the solar system using epicycles

used large metal instuments to accurately measure the positions of the planets.

made the first heliocentric model of the solar system.

devised three laws of planetary motion.

Galileo discovered that which planet undergoes phases as viewed from earth?

Consider the diagram of a planetary orbit. Which position best represents the sun's position?

The apparent change in the position of an object because of the motion of the observer is called _____________.

According to Kepler's 2nd Law, the planets move slowest when they are at which point in their orbit?

Planetary orbits that are more elliptical have a greater _________.

By using Kepler's 3rd Law we find that ___________.

The brightening of the night sky by light scattered from artificial outdoor lighting is called ___________.

The light collecting area of a telescope is larger in telescopes which have a larger ____________.

Select the three main categories of observation generally used by astronomers from the list below.

A telescope is used to take two images, one magnified 100x and the other magnified 400x. In which image would you be able to see the most detail and why?

Two stars are separated by 0.5 arcseconds. Candy's telescope has an angular resolution of 0.3 arcseconds. Billy's telescope has an angular resolution of 0.8 arcseconds. If both of them photograph the stars, which photograph will show two stars?

Which of the following effects is cause by atmospheric turbulence?

The angular size of the smallest features that a telescope can see is called the angular ________.

What process allows two or more small telescopes to achieve the angular resolution of a much larger telescope?

When light rays from a distant star pass through a lens they converge at a single point called the _______.

The two types electromagnetic waves transparent to our atmosphere are _______.

What kinds of telescopes use a lens to gather and collect light?

True or False: The largest telescopes are refracting telescopes.

A particle of light is called a ___________.

By examining the widths of the spectral lines we can find information about a star's _________.

The lowest energy state of an atoms is called the _________ state.

From examining the peak wavelength of the light emitted from a star we can determine the star's __________.

The number of wave cycles per second is called the _________.

In a vacuum, a blue photon has _____________ a red photon.

Match the spectrum with the correct picture.

The shifting of the observed wavelength of light due to the motion of the source toward or away from the observer is called the _____________.

The distance between two adjacent peaks in a wave is called the ___________.

Which subatomic particles are contained in the nucleus of an atom?

The perceived change in the position of an object due to a change in the observer's point of view is called _______________.

If a star has a large luminosity and also a low surface temperature then it must have __________.

Which of the following sequences of spectral classes represents the coolest to hottest stars?

Which of the following concerning the sun is its luminosity class?

Consider the HR diagram shown. To which group does the star Procyon B

Considering the HR diagram above, which of the listed stars is the coolest?

Considering the HR diagram above, which of the listed stars is the brightest?

Considering the HR diagram above, which of the listed stars is the smallest?

Using the HR diagram, determine which has more mass, the Sun or Vega?

If a star has a parallax of 0.25 arc seconds, what is the distance to that star?

Alan lives on a planet that is two times closer to a star than Zorg. Alan sees the star as being __________ than Zorg does.

A binary star system that is detected from Doppler shifted spectra is called ___________.

In terms of energy transport, what are the regions of the Sun's interior from the core outward?

Main sequence stars, such as the Sun, shine by _________ in their interiors.

What element is currently building up in the Sun's core?

As the sun becomes a red giant, its surface temperature will ________ while its luminosity will ___________.

When the sun becomes a red giant, it will expand to approximately _______ its current radius.

The nearly explosive beginning of helium burning in the dense core of red giant stars is called a _____________.

The balance between gas pressure and the weight of a star is called _________ equilibrium.

Which of the listed colors of main sequence stars will have the shortest main- sequence lifetime?

In Cepheid variable stars there is an important relationship between what two quantities that allows us to find the distance to these stars? (choose the two)

We can estimate the age of an open cluster of stars by examining _________.

A zero-age main-sequence star is one that can __________.

Blue main sequence stars have ___________ than red main sequence stars.

The name of the galaxy in which we live is called the

The thick distribution of hot gasses and stars surrounding the center of a galaxy is called the galactic

The Population I stars in our galaxy are located

According to the most modern explanation, what is Sgr A*?

The globular clusters in our galaxy are located

The flattened circular part of the galaxy is called the galactic

The O and B stars in our galaxy are located

The earth completes one _______ around the Sun every year

The average distance from the sun to Uranus is about 19 astronomical units. Therefore

The earth completes one _______ around the Sun every year

How long does it take for the earth to complete one cycle of its precession?

The summer solstice is the point on the sun's path __________.

We experience summer when ______

What phase of the moon is pictured here?

What phase of the moon is between the last quarter and the new moon?

What is the phase of the moon 4 days before the new moon?

How long does it take for the moon to rotate on its axis?

A particular cycle of similar eclipses that recur about every 18 years is called the ______

What is the phase of the moon during a particular solar eclipse?

The amount of time from one new moon to the next is referred to as a _______ month

Annular eclipses are ___________

First used a telescope to observe celestial objects

According to Kepler's 2nd law each 30 day period a planet will

Which telescopes use a mirror to gather and collect light

the most important feature of a telescope is its

The surface temperature of the sun is approximately 5800K. What is the approximate temperature of the sun's corona?

Which of the following describes the gases in the Sun's corona?

Charged particles continually blown outward from the Sun in all directions make up the solar

How much time passes between two successive sunspot minima?

The primary nuclear reaction providing energy inside the Sun's core converts __________

Which picture plays the sun's chromosphere

Where does the Sun's energy come from?