Astronomy, HWL07

If the Moon is rising at midnight, the phase of the Moon must be

What conditions are required for a lunar eclipse?

If the Moon is relatively far from Earth, so that the umbra does not reach Earth, someone directly behind the umbra will see

How many arc-seconds are in 1°?

When are eclipse seasons?

What effect or effects would be most significant if the Moon's orbital plane were exactly the same as the ecliptic plane?

What is a circumpolar star?

TRUE/FALSE. You can find the tilt of Earth's axis by measuring the angle between your horizon and the North Star.

In addition to the conditions required for any solar eclipse, what must also be true in order for you to observe a total solar eclipse?

Which of the following statements about lunar phases is true?

You are standing on Earth's equator. Which way is Polaris, the North star?

We describe a position on Earth's surface by stating its

In which direction does a quarter Moon rise?

Which of the following statements about the ecliptic plane is not true? A) It is the plane of Earth's orbit around the Sun. B) It is the plane of the Moon's orbit around Earth. C) The nodes of the Moon's orbit lie in the ecliptic plane. D) During a solar eclipse, the Moon lies in the ecliptic plane. E) During a lunar eclipse, the Moon lies in the ecliptic plane.

TRUE/FALSE. It is possible to see the full Moon rising just before sunrise.

TRUE/FALSE. The Moon and the Sun are approximately the same angular size.

TRUE/FALSE. The Milky Way can be seen only from the Northern Hemisphere.

What makes the North Star, Polaris, special?

Which of the following statements is true? A) Both the Northern and Southern hemispheres receive the same amount of sunlight on the equinoxes. B) The Southern Hemisphere receives the most direct sunlight on the summer solstice. C) The Northern Hemisphere receives the most direct sunlight on the summer solstice. D) Both the Northern and Southern hemispheres receive the same amount of sunlight on the solstices. E) Both A and C are true.

Ancient people who knew the Saros cycle could

Ashen light (or earthshine) is

Suppose you live on the Moon. How long is a day (i.e., from sunrise to sunrise)?

TRUE/FALSE. At midnight it is sometimes possible to observe the crescent Moon on the meridian.

Which of the following best describes the modern definition of a constellation? A) a pattern of bright stars in the sky B) a collection of stars that are near one another in space C) a Greek mythological figure D) a region of the celestial sphere E) a group of stars that all lie at about the same distance from Earth

Which of the following statements about the Moon is true? A) If you see a full Moon from North America, someone in South America would see a new Moon. B) The Moon's distance from Earth varies during its orbit. C) The Moon is visible only at night. D) The side of the Moon facing away from Earth is in perpetual darkness. E) The Moon goes through a cycle of phases because it always has the same side facing Earth.

By locating the north celestial pole (NCP) in the sky, how can you determine your latitude?

At approximately what time would a full Moon be on your meridian?

What conditions are required for a solar eclipse?

When someone on Earth observes the Moon in the first quarter phase, someone on the Moon facing Earth observes Earth in the

TRUE/FALSE. The seasons on Earth are caused by its elliptical orbit around the Sun.

Which of the following statements about circumpolar stars is true at all latitudes?

Why is it summer in the Northern Hemisphere when it is winter in the Southern Hemisphere?

If part of the full Moon passes through Earth's umbra, we will see a(n)

What is an astronomical unit?

Which of the following correctly describes the meridian in your sky? A) the boundary between the portion of the celestial sphere you can see at any moment and the portion that you cannot see B) the point directly over your head C) a half-circle extending from your horizon due north, through your zenith, to your horizon due south D) a half-circle extending from your horizon due east, through the north celestial pole, to your horizon due west E) a half-circle extending from your horizon due east, through your zenith, to your horizon due west

TRUE/FALSE. If you lived on the Moon, you'd see full Earth when we see new Moon.

All of the following statements are true. Which one explains the reason why there is not a solar eclipse at every new Moon? A) The nodes of the Moon's orbit process with an 18 year period. B) The orbital plane of the Moon is tilted by about 5° to the ecliptic plane. C) The Moon rotates synchronously with its revolution about Earth. D) The sidereal month is shorter than the lunar month. E) The Moon is the primary cause of tides on Earth.

What is the ecliptic?

Why do we have seasons on Earth?

Which of the following statements does not use the term angular size or angular distance correctly? A) The angular distance between those two bright stars in the sky is about 2 meters. B) The angular size of the Moon is about 1/2 degree. C) The angular distance between those two houses in the distance is 30°. D) The angular size of the Sun is about the same as that of the Moon. E) You can use your outstretched hand to estimate angular sizes and angular distances.

If the Moon rises around 3 A M , its phase must be

TRUE/FALSE. It is possible to see the third quarter Moon near the western horizon at sunrise.

TRUE/FALSE. A lunar eclipse occurs only when the Moon is new.

Why do we see essentially the same face of the Moon at all times?

If the Moon is setting at noon, the phase of the Moon must be

Orion is visible on winter evenings but not summer evenings because of

Which of the following statements about the celestial equator is true at all latitudes? A) It extends from your horizon due north, through your zenith, to your horizon due south. B) It cuts the dome of your sky exactly in half. C) It extends from your horizon due east, through your zenith, to your horizon due west. D) It represents an extension of Earth's equator onto the celestial sphere. E) It lies along the band of light we call the Milky Way.

TRUE/FALSE. Columbus was the first person to discover that Earth is round.

Which of the following statements about the celestial sphere is not true? A) The "celestial sphere" is just another name for our universe. B) The celestial sphere does not exist physically. C) When we look in the sky, the stars all appear to be located on the celestial sphere. D) From any location on Earth, we can see only half the celestial sphere at any one time. E) Earth is placed at the center of the celestial sphere

TRUE/FALSE. A solar eclipse occurs only when the Moon is new.