The Sun-Earth-Moon System. Tools of Astronomy The Moon Sun-Earth-Moon System. Chap. 28. Objectives. Tools of Astronomy – 28.1. describe electro-magnetic radiation. explain how telescopes work describe space exploration. http://www.physics.unr.edu/cshirley/images.html.
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Tools of Astronomy
The longer the wave the the frequency
The longer the wave the shorter the frequency
Yerkes observatory (WI), 1897
Globular Star Cluster M15, Milky Way
This is the secondary function of a telescope
Keck Observatory – Mauna Kea
The first , launched by .
The first satellite, launched by Russia
first man in space, he was from .
Yuri Gagarin first man in space, he was from Russia.
was the first American in space.
Alan Shepard Jr was the first American in space.
This craft was designed to carry people.
This craft was designed to carry 2 people.
Landed the first man, , on the moon.
Landed the first man, Neil Armstrong, on the moon.
Only Jupiter and Saturn have larger moons.
Most moons are closer to their planets.
Not icy or gaseous like many other moons.
Mercury and Venus have none, Mars’ moons are tiny
Albedo describes amount of sunlight reflected.
This is due to the moon’s lack of .
This is due to the moon’s lack of an atmosphere.
Light in color, mountainous, and cratered.
Dark, smooth plains, associated with rilles (long, narrow straight valley
Material expelled from crater. Long strands of ejecta are called rays.
This is because there is more on Earth.
This is because there is more weathering on Earth.
Based on radioisotope dating of rocks.
Most of the craters have dark ejecta meaning they’re old.
This is the loose, ground up moon rock.
This explains the darker color.
Not created by flowing water, but flowing lava.
Moon formed elsewhere and was captured by Earth’s gravity.
Moon and Earth formed in space at same time, near each other
Earth was hit by Mars-size object, and layers of crust/mantle material were ejected.
We are moving at a speed of mph around the sun (and rotating about mph).
We are moving at a speed of 67,000 mph around the sun (and rotating about 1000 mph).
How do we know there is motion?
Each day the sun moves an apparent 360º. This means it appears to move º/minute.
Each day the sun moves an apparent 360º. This means it appears to move 0.25 º/minute.
. . .and not the rest of the universe?
It tilts by .
It tilts by 23.5º.
Altitude is measured in degrees from the observer’s horizon to the object..
The moon is between Earth and the Sun – we don’t see the lit surface
Waxing means increasing
Observed ¼ of the way through a lunar month
Gibbous means more than ½ but less than full
The moon is on opposite sides of the Earth from the Sun – we see the entire lit surface
Waning means decreasing in size/intensity
Observed ¾ into the lunar month
For each revolution of the moon it makes one rotation.
Each night the moonrise occurs about minutes later.
Each night the moonrise occurs about 50 minutes later.
June 29, 2006 Solar Eclipse
If the umbra passes over your location you see no sun ( Eclipse)
If the umbra passes over your location you see no sun (Total Eclipse)
If the penumbra passes over your location you see some of the sun ( Eclipse)
If the penumbra passes over your location you see some of the sun (Partial Eclipse)
Occurs when the Earth/Moon system are separated by maximum distance.
Furthest distance between Moon and Earth.
Smallest distance between Moon and Earth.
Moon is partially blocked by the .
Moon is partially blocked by the Sun.