__________________________?
• When the moon’s shadow hits Earth or Earth’s shadow
hits the moon, an eclipse occurs. When an object in
space comes between the sun and a third object, it casts
a shadow on that object causing an eclipse.
• What is the difference between “phases” and
“eclipses?”
•
_________________________?
• A solar eclipse occurs when the moon
passes directly between Earth and the sun,
blocking sunlight from parts of Earth. (p. 674)
• What phase of the moon is this?
When is the next solar eclipse?
August 21, 2017
• http://www.huffingtonpost.com/entry/2017-solar-eclipse-will-be-the-mostawesome-one-in-99-years_us_57c6ee16e4b0e60d31dc6ff3
Don’t look directly at a solar eclipse!
If you want to observe the sun!
• Solar observing using a projected image of the
Sun from a telescope
Solar Eclipse
____________________________?
• During a lunar eclipse, Earth blocks sunlight
from reaching the moon.
• What phase of the moon is this?
____________________________?
• The very darkest part of the moon’s shadow,
the umbra, is cone-shaped.
____________________________?
• The larger part of the moon’s shadow is
called the penumbra.
When is the next lunar eclipse?
• The next lunar eclipse that we will be to see in
America is a penumbral lunar eclipse on Feb. 11,
2017
• January 31, 2018: Total eclipse.
Why don’t we have eclipses once a month?
• The orbit of the Moon is
tilted by about five
degrees with respect to
the Earth’s orbit, so that
usually the Moon
passes slightly above
or below the line
between the Sun and
the Earth.
• At most new and full
Moons, the shadows
miss their mark and no
eclipse occurs. Only
about every six months,
during an eclipse
season, are the
conditions right for a
lunar or solar eclipse.
Mars has eclipses!
(Phobos solar eclipse as seen by Curiosity)