Space Forum / Amateur Astronomy / November 2007

What digital cameras are capable of 30-60 sec exposures?
Dean

The night was clear and not too cold at 28 degrees, (-2 C,) so I decided
to run out at about 9:30pm with my C8 and take a quick look at Comet
Holmes before the predicted snow and ice hit this weekend.  The comet
was still visible to the naked eye in the beautiful star field of

Hi. There is one thing that I have always been confused about visible
light as an electromagnetic force.  I understand light to be an
electromagnetic wave propagating through space with the the magnetic
and electro forces alternately collapsing and expanding.  This

Why do H-alpha scopes say that the passband is 0.5 - <1 angstroms when the
Balmer series
clearly shows that H-alpha is the transition at 6563 angstroms6563 Å
http://www.daviddarling.info/encyclopedia/H/H-alpha.html

http://www.esa.int/esaSC/SEMRYE63R8F_index_0.html
This image was taken using ORANGE green and blue filters.  What happened to
RED green and blue? (RGB)
The earth looked like this in the 60's. The earth does not look like this

here is an image I've captured in the city of Rome (Italy) with
reflector Flat Field Camera 760/4 and ccd  ST-10XME +
filter H-alpha 3nm.
www.danilopivato.com

Most groups that start off as 100% moderated quickly change to
something more manageable. The number of 100% moderated group that I
have had dealings with that worked smoothly for more than a few weeks
is exactly ZERO.

Hi, my name is Ed Doscher. I am not a scientist, but I have authored
several copywrited essays on various aspects of the universe. I also
like to comment on what the leading scientist are saying about the
universe. Please visit my website: http://www.ejdoscher.com

Haven't done any real viewing with my 8" SCT in a many a year (kids),
and decided to just gaze up in the night.  What was the planet ( i
think) next to the moon, say perhaps 2 fingers low and to the right of
it?  I went out at 7PM PST and they were both pretty low in the

Einstein's E=mc2 Generalized
is based upon the fact, that Einstein's Sep. 1905 derivation of L=mc2
(light energy mass equivalence), is true under SPECIAL CONDITIONS ,
not in general.

Hi everyone. I am very interested in getting into the field of amateur
astronomy. I am a computer scientist and systems engineer. I am simply
looking for something to do in my spare time other than writing code
and designing computer components. Other than the two courses I took

Dutifully the U.S. keeps spending money it no longer has on this
albatross.  Adding more and more labs, modules, wiring to the edifice
that keeps on taking.  To what end?
Spacewalking astronauts hook up Harmony module

It had to happen sooner or later. The End of the World meme (Global
Warming
Vsn. 22.70) has gone cosmic. Yes folks, the destruction of the whole
Universe is at hand. As the London Telegraph headlines, cosmologists

Just stepped out to take a look at the comet with Canon 15x45 IS
binoculars. It was dimmer and larger than my last observation one week
ago ,with the nucleus detectable using averted vision. The comet is
right next to Mirfak in Perseus, and it appears the tail end of the

Some in here may have caught on that I've been "collecting" views of
1950's space junk.  Hardly spectacular stuff, but if you were a
spellbound kid during the dawn of the space age, well... you older guys
understand.