The Motion of the Moon The Moon The Earth, Sun, and Time of Day

More documents

Recommendations

Info

Astronomy 310 (Newbury) May 15, 2007 The Orbiting Moon Moon Phases one side dark sunlight one side lit by sunlight Moon The Moon orbits around the Earth every ______days. The Sun always illuminates one side of the Moon, the side towards the Sun, no matter where the Moon is in ________. The big question is, what does the Moon look like _____________ throughout the orbit The key point is realizing we do not always see the ________ of the Moon. The amount of the sunlit half we see depends on where the Moon is in it’s orbit. see all dark, sliver of lit sunlight 5 We see the new Moon during the day (but not ______). 6 Waxing Crescent Earthshine see mostly dark but some lit, too sunlight Sometime there is so much light reflected back off the ______ and on the Moon that we can see the “_____” portion of the Moon. We call this Earthshine. One ______ of the way through the cycle (3 – 4 days) we see a crescent Moon (in the evening). The crescent “points” towards the Sun. The crescent is ______ every day, so it’s called the waxing crescent. 7 Rychlik 8 2
Astronomy 310 (Newbury) May 15, 2007 First Quarter Surface of the Moon half dark half lit sunlight One quarter of the way through the cycle (_____) we see half the Moon lit (and half dark). We still call it the first ______ Moon, though, because of its position in the lunar cycle. 9 The Moon has no atmosphere to scatter and bend the sunlight, like we do here on Earth. So, when the Sun sets or you’re in a shadow (on the Moon) it’s ______ ______. And when the Sun is visible, it’s as bright as the middle of the day. The line between night and day on the Moon is called the __________. Using binoculars or a telescope, you can clearly see the surface of the Moon is not smooth, but that it’s covered in craters. Around first quarter is the _____ time for looking. Lammel 10 Waxing Gibbous Full Moon but mostly lit sunlight Moon all lit sunlight some dark About 10 days into the lunar cycle, the ______ side of the Moon is still growing. It’s called a waxing gibbous (“________” means “humped” or “bulging”). 11 can’t see any of the dark side ________ through the cycle (2 weeks) the Moon is full. You only see the full Moon from the night-side of Earth (it rises in the East at sunset and sets in the West at sunrise.) Wait a minute! Won’t the Earth ______ the sunlight No, not every lunar cycle. We’ll discuss lunar ______ 12 in the next section… 3
Page 1: Astronomy 310 (Newbury) May 15, 200
Page 5 and 6: Astronomy 310 (Newbury) May 15, 200

The Motion of the Moon The Moon The Earth, Sun, and Time of Day

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?