Transcript TohlineEclipses_08

ECLIPSES
WHY ECLIPSES NOT EVERY
NEW- AND FULL-MOON
Plane of Moon’s orbit 5° tilted from plane of Earth’s orbit around Sun
If the orbit of the Moon was in the same plane as the orbit of
the Earth, then how many solar eclipses per lunar month
would there be?
1.
2.
3.
4.
5.
Daily (~30 times in a month)
Four times
Twice
Once
Never
SOLAR ECLIPSE
TYPES OF SOLAR ECLIPSES
TOTAL:
ANNULAR:
PARTIAL:
PATH OF TOTALITY
PATHS OF TOTALITY
I went to the 11 July 1991 total solar eclipse in Hawaii.
This was clouded out, but I did see the Moon two days later.
What time of day did I see the Moon?
1.
2.
3.
4.
5.
Noon
Just after sunset
Midnight to dawn
Just before dawn
Just after dawn
LUNAR ECLIPSE
PARTIAL:
TOTAL:
WHY IS THE ECLIPSELIGHT
REDDISH IN COLOR?
TO SUN
Blue light skimming through our atmosphere is almost all scattered away
Red light skimming through our atmosphere gets through but is bent by refraction
Someone standing on the Moon during a lunar eclipse will see a ring of red light
all around the edge of the Earth -- all the world’s sunsets and sunrises
TOTAL LUNAR ECLIPSE
FEBRUARY 20th!
STAR PARTY AT
LSU OBSERVATORY
WEDNESDAY: 8:00-10:00 PM
Roof of Nicholson Hall
The next eclipse is a lunar eclipse on the evening of
Wednesday February 20. With a 50 minute duration of totality
(9:01-9:51 PM), the Moon will be fairly high in the eastern
sky above Baton Rouge. Will this eclipse be visible from
Florida or Australia (if their skies are clear)?
1.
2.
3.
4.
Yes, visible from Florida & Australia
Visible from Florida but not Australia
Not visible from Florida, but visible from Australia
Not visible from Florida or Australia
FEAR OF ECLIPSES
COLUMBUS’ TRICK
COLUMBUS’ TRICK REPLAYED