A Space & astronomy forum. SpaceBanter.com

If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below.

Go Back   Home » SpaceBanter.com forum » Search Forums
Site Map Home Authors List Search Today's Posts Mark Forums Read Web Partners

Showing results 1 to 25 of 500
Search took 3.44 seconds.
Search: Posts made by: Mike Dworetsky
Forum: Astronomy Misc June 21st 17, 06:10 PM Posted to sci.astro
Replies: 6
Views: 257
Posted By Mike Dworetsky
2035 Eclipse

John wrote:
On Wed, 21 Jun 2017 08:04:32 +0100, "Mike Dworetsky"
wrote:

Fritz Owl wrote:
Even though it is 18 years away, the 2035 eclipse could...
Forum: Astronomy Misc June 21st 17, 08:04 AM Posted to sci.astro
Replies: 6
Views: 257
Posted By Mike Dworetsky
2035 Eclipse

Fritz Owl wrote:
Even though it is 18 years away, the 2035 eclipse could present a
problem for some American travellers as Pyongyang will be in the path
of totality, and that one Congressman is...
Forum: Research April 4th 17, 05:29 AM Posted to sci.astro.research
Replies: 20
Views: 1,066
Posted By Mike Dworetsky
NET Angular Momentum of Globular cluster of stars

Steve Willner wrote:
In article ,
writes:
Is the NET angular momentum of a globular cluster of stars, zero?

...
Forum: Research January 25th 17, 06:51 PM Posted to sci.astro.research
Replies: 2
Views: 568
Posted By Mike Dworetsky
How to get scope time to obtain 7 spectra?

wrote:
Is there any path anyone knows for me to get some scope time to take
some spectra and determine what 7 targets around an interacting galaxy
pair are? They are...
Forum: Astronomy Misc December 30th 16, 11:32 AM Posted to sci.astro
Replies: 1
Views: 241
Posted By Mike Dworetsky
Calculating G

Peter Riedt wrote:
Calculating G

The constant G was anticipated by Newton but first accurately
determined in the laboratory by Henry Cavendish in 1798. It has the
value...
Forum: Astronomy Misc December 14th 16, 01:43 PM Posted to sci.astro
Replies: 19
Views: 1,231
Posted By Mike Dworetsky
1) the negative paraxes...

wrote:
Il giorno mercoledì 14 dicembre 2016 08:44:15 UTC+1, Poutnik ha
scritto:
Dne 13/12/2016 v 09:44 Martin Brown napsal(a):
On 12/12/2016 06:42, Poutnik...
Forum: Astronomy Misc December 11th 16, 09:50 PM Posted to sci.astro
Replies: 19
Views: 1,231
Posted By Mike Dworetsky
1) the negative paraxes...

Poutnik wrote:
Dne 11/12/2016 v 17:57 Mike Dworetsky napsal(a):


Your suspicion is correct. If you have a list of parallaxes of very
distant objects, so that their parallaxes are on...
Forum: Astronomy Misc December 11th 16, 04:57 PM Posted to sci.astro
Replies: 19
Views: 1,231
Posted By Mike Dworetsky
1) the negative paraxes...

wrote:
..from the topic ''Letter to a friend ''
.. the negative parallaxes are a big mistery , as i told many times
.. almost nobody want to speak about it , and almost all...
Forum: Astronomy Misc December 4th 16, 11:18 AM Posted to sci.astro
Replies: 27
Views: 1,130
Posted By Mike Dworetsky
Black Body

Poutnik wrote:
Dne 03/12/2016 v 17:48 Mike Dworetsky napsal(a):


A planet or moon or asteroid is a reasonable approximation to a BB
if it does not have an atmosphere, and if it does, the...
Forum: Astronomy Misc December 3rd 16, 04:48 PM Posted to sci.astro
Replies: 27
Views: 1,130
Posted By Mike Dworetsky
Black Body

David Levy wrote:
Black Body
https://en.wikipedia.org/wiki/Black_body
"An ideal body is now defined, called a blackbody. A blackbody allows
all incident radiation to pass into it (no...
Forum: Astronomy Misc October 26th 16, 08:29 AM Posted to sci.astro
Replies: 3
Views: 607
Posted By Mike Dworetsky
The relativity of the sky that we see...

Steve Willner wrote:
In article ,
writes:
So the positive and negative parallaxes have the same probability
to exis=...
Forum: Astronomy Misc February 17th 16, 08:32 AM Posted to sci.astro
Replies: 11
Views: 505
Posted By Mike Dworetsky
Kepler's 3rd with adjusted periods and radii

Peter Riedt wrote:
On Wednesday, February 17, 2016 at 1:17:00 AM UTC+8, Poutnik wrote:
Dne úterý 16. února 2016 14:22:00 UTC+1 Peter Riedt napsal(a):
On Tuesday, February 16, 2016 at 4:03:53...
Forum: Astronomy Misc February 16th 16, 08:03 AM Posted to sci.astro
Replies: 11
Views: 505
Posted By Mike Dworetsky
Kepler's 3rd with adjusted periods and radii

Peter Riedt wrote:
Kepler's 3rd with adjusted periods and radii

Kepler's third law in the form t2/r3 gives a constant for solar
objects such as planets and asteroids. It is a precise law...
Forum: Astronomy Misc January 5th 16, 09:53 AM Posted to sci.astro
Replies: 3
Views: 738
Posted By Mike Dworetsky
Reason for wide range of star behavior

Poutnik wrote:
Hello,

I have noticed there is quite a lot of different star behaviours.

Are the star properties and behaviour
more or less determined by initial mass and evolution stage...
Forum: Astronomy Misc November 16th 14, 09:32 AM Posted to sci.astro
Replies: 11
Views: 856
Posted By Mike Dworetsky
First landing ever of spacecraft on a comet happend less than 12 hours ago!

Dr J R Stockton wrote:
In sci.astro message , Fri,
14 Nov 2014 08:46:54, Mike Dworetsky
posted:


The main...
Forum: Astronomy Misc November 15th 14, 09:39 AM Posted to sci.astro
Replies: 11
Views: 856
Posted By Mike Dworetsky
First landing ever of spacecraft on a comet happend less than 12 hours ago!

John wrote:
On Fri, 14 Nov 2014 19:13:26 +0000 (GMT), "Rodney Pont"
wrote:

On 14 Nov 2014 19:03:48 GMT, Jens Schweikhardt wrote:

# The main requirement...
Forum: Astronomy Misc November 14th 14, 10:21 PM Posted to sci.astro
Replies: 11
Views: 856
Posted By Mike Dworetsky
First landing ever of spacecraft on a comet happend less than 12 hours ago!

Jens Schweikhardt wrote:
Mike Dworetsky wrote
in :
...
# The main requirement would seem to be an ability to slow...
Forum: Astronomy Misc November 14th 14, 08:46 AM Posted to sci.astro
Replies: 11
Views: 856
Posted By Mike Dworetsky
First landing ever of spacecraft on a comet happend less than 12 hours ago!

Bjørn Sørheim wrote:
On Thu, 13 Nov 2014 15:08:50 -0000, "Mike Dworetsky"
wrote:

Bjørn Sørheim wrote:
Philae on Comet...
Forum: Astronomy Misc November 13th 14, 03:08 PM Posted to sci.astro
Replies: 11
Views: 856
Posted By Mike Dworetsky
First landing ever of spacecraft on a comet happend less than 12 hours ago!

Bjørn Sørheim wrote:
Philae on Comet 67P/Churyumov-Gerasimenko.

And then no discussion about it on sci.astro??
What have this ng turned into? More or less a sesspool of destructive
...
Forum: Astronomy Misc June 26th 14, 08:42 AM Posted to sci.astro,sci.physics
Replies: 35
Views: 767
Posted By Mike Dworetsky
Remarkable white dwarf star possibly coldest, dimmest ever detected

Poutnik wrote:
Dne 26.6.2014 2:11, Michael J. Strickland napsal(a):
"Yousuf Khan" wrote in message

It's only 3000K in...
Forum: Astronomy Misc April 11th 14, 04:09 PM Posted to sci.astro
Replies: 5
Views: 246
Posted By Mike Dworetsky
Daylight Saving Time - How To Explain It To The Average Citizen

Jan Panteltje wrote:
On a sunny day (Fri, 11 Apr 2014 04:06:00 -0700 (PDT)) it happened
wrote in
:

Seriously,...
Forum: Astronomy Misc March 5th 14, 08:15 AM Posted to sci.astro
Replies: 16
Views: 352
Posted By Mike Dworetsky
How visible is Sirius B from Sirius A?

Brad Guth wrote:

Sirius(b) is mostly emitting photons in the UV spectrum, so don't
expect any human visual capability of even telescope aided views of
that one.

Which of course does not...
Forum: Astronomy Misc March 4th 14, 09:13 AM Posted to sci.astro
Replies: 16
Views: 352
Posted By Mike Dworetsky
How visible is Sirius B from Sirius A?

Steve Willner wrote:
In article ,
"Mike Dworetsky" writes:
I'm not sure how you are doing this calculation. The...
Forum: Astronomy Misc March 3rd 14, 08:55 AM Posted to sci.astro
Replies: 16
Views: 352
Posted By Mike Dworetsky
How visible is Sirius B from Sirius A?

Yousuf Khan wrote:
On 02/03/2014 9:05 PM, Kate Orman wrote:
Hi. I'm an SF writer, and many years ago I asked a pretty basic
question here in sci.astro and got some extremely helpful answers,...
Forum: Astronomy Misc December 27th 13, 11:59 AM Posted to sci.astro,sci.physics
Replies: 3
Views: 149
Posted By Mike Dworetsky
Billion dollar observatory will map the Milky Way

Yousuf Khan wrote:
On 26/12/2013 9:10 PM, Sam Wormley wrote:
On 12/26/13, 8:00 PM, Yousuf Khan wrote:
Billion dollar observatory will map the Milky Way
...
Showing results 1 to 25 of 500

 
Forum Jump

All times are GMT +1. The time now is 03:29 PM.


Powered by vBulletin® Version 3.6.4
Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
Copyright ©2004-2019 SpaceBanter.com.
The comments are property of their posters.