Solar Eclipse - Page 2

philmoore · 2005-10-03, 15:51

I saw a nice webcast of the annular phase from Madrid at 2am Oregon time.

Actually, Mally, a solar and lunar eclipse always appear two weeks apart, every six months, but usually, if the solar eclipse is a good one, total or annular, then the lunar eclipse will only be partial or penumbral, and conversely, if the lunar eclipse is total, the solar eclipse will be only partial. There was an exception, I believe, in 2003, when we had both a good lunar and solar eclipse in the autumn. Of course, eclipses are not visible over the entire planet, so they do not seem quite so common, but there is a total solar eclipse somewhere, on average, every 1.5 years or so.

mfgoode · 2005-10-03, 16:19

:surprised
Thank you philmore. Theres a lot of information in that para of yours.
Comparing Jussi's post and mine the shadow was spotted at 2.50 p.m. (IST) and I had appx 1 1/2 hrs here in Mumbai for it to arrive. Thats a fast speed to travel indeed! Knowing the distance one can compute the speed. This no doubt will vary from time to time but what would be an average speed the umbra/penrumbra travels over the earths surface? Please give us some idea of it. Thanking you
Mally

Numbers · 2005-10-05, 12:45

You can see a great picture of this one here:

http://antwrp.gsfc.nasa.gov/apod/astropix.html

Ever since finding this site on the "Interesting Links" thread I have had it on my favourites, and they have some great pictures. A couple of days ago they had a terrific close-up of Hyperion which made it look a lot more interesting than the muddy, brown blob I've seen in other photos.

mfgoode · 2005-10-05, 17:55

[QUOTE=Numbers]You can see a great picture of this one here:

http://antwrp.gsfc.nasa.gov/apod/astropix.html

Thanks for the website. The picture is very good. But the Moon did not have a large enough angular size to block the entire Sun. Thats why it could not show the diamond ring effect I spoke about in my post.
Today in the papers I saw excellent pictures and close up of Saturn's moon Tethys. It revealed an icy land of steep cliffs by The Cassini-Huygens mission which is a co-operative project Of Nasa, The european Space Agency and the Italian Space Agency. The pictures were taken at appx. 32,000 km from Tethys and at a phase angle of 20 degrees.
The pictures of Hyperion another moon of Saturn I agree are not so good and are due to the the dark material concentrated in the bottoms of its many craters unlike Tethys's which has brigther material in the floors of many craters.
Mally

philmoore · 2005-10-05, 18:17

I don't know if you saw the Hyperion picture that Numbers mentioned at:
http://antwrp.gsfc.nasa.gov/apod/ap051003.html
This picture just blew me away!

mfgoode · 2005-10-05, 18:49

Quote:

Originally Posted by philmoore

I don't know if you saw the Hyperion picture that Numbers mentioned at:
http://antwrp.gsfc.nasa.gov/apod/ap051003.html
This picture just blew me away!

This is a similar picture to the close up of Tethys I have in the paper in front of me.
Asfaik Numbers gave a shot of the eclipse (compare the differnt websites) which is relevant to my comments on the diamond ring effect.
The picture I have is of the ridges of the southernmost extent of what is called the Ithaca Chasma of Saturns moon Tethys.
Anyway thanks for the breathtaking view of Hyperions surface. It is similar to the coral reefs one sees in Mauritius bordering the island.
Mally

2005-10-03, 16:19	#13
mfgoode Bronze Medalist Jan 2004 Mumbai,India 804₁₆ Posts	Solar eclipse :surprised Thank you philmore. Theres a lot of information in that para of yours. Comparing Jussi's post and mine the shadow was spotted at 2.50 p.m. (IST) and I had appx 1 1/2 hrs here in Mumbai for it to arrive. Thats a fast speed to travel indeed! Knowing the distance one can compute the speed. This no doubt will vary from time to time but what would be an average speed the umbra/penrumbra travels over the earths surface? Please give us some idea of it. Thanking you Mally

2005-10-05, 17:55	#15
mfgoode Bronze Medalist Jan 2004 Mumbai,India 2²×3³×19 Posts	Solar Eclipse [QUOTE=Numbers]You can see a great picture of this one here: http://antwrp.gsfc.nasa.gov/apod/astropix.html Thanks for the website. The picture is very good. But the Moon did not have a large enough angular size to block the entire Sun. Thats why it could not show the diamond ring effect I spoke about in my post. Today in the papers I saw excellent pictures and close up of Saturn's moon Tethys. It revealed an icy land of steep cliffs by The Cassini-Huygens mission which is a co-operative project Of Nasa, The european Space Agency and the Italian Space Agency. The pictures were taken at appx. 32,000 km from Tethys and at a phase angle of 20 degrees. The pictures of Hyperion another moon of Saturn I agree are not so good and are due to the the dark material concentrated in the bottoms of its many craters unlike Tethys's which has brigther material in the floors of many craters. Mally

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2005-10-03, 15:51	#12
philmoore "Phil" Sep 2002 Tracktown, U.S.A. 1119₁₀ Posts	I saw a nice webcast of the annular phase from Madrid at 2am Oregon time. Actually, Mally, a solar and lunar eclipse always appear two weeks apart, every six months, but usually, if the solar eclipse is a good one, total or annular, then the lunar eclipse will only be partial or penumbral, and conversely, if the lunar eclipse is total, the solar eclipse will be only partial. There was an exception, I believe, in 2003, when we had both a good lunar and solar eclipse in the autumn. Of course, eclipses are not visible over the entire planet, so they do not seem quite so common, but there is a total solar eclipse somewhere, on average, every 1.5 years or so.

2005-10-05, 12:45	#14
Numbers Jun 2005 Near Beetlegeuse 2²×97 Posts	You can see a great picture of this one here: http://antwrp.gsfc.nasa.gov/apod/astropix.html Ever since finding this site on the "Interesting Links" thread I have had it on my favourites, and they have some great pictures. A couple of days ago they had a terrific close-up of Hyperion which made it look a lot more interesting than the muddy, brown blob I've seen in other photos.

2005-10-05, 18:17	#16
philmoore "Phil" Sep 2002 Tracktown, U.S.A. 3·373 Posts	I don't know if you saw the Hyperion picture that Numbers mentioned at: http://antwrp.gsfc.nasa.gov/apod/ap051003.html This picture just blew me away!