RSS iconTwitter iconFacebook icon

The Trek BBS title image

The Trek BBS statistics

Threads: 143,850
Posts: 5,636,987
Members: 25,484
Currently online: 567
Newest member: mid83

TrekToday headlines

Retro Review: The Dogs of War
By: Michelle on Mar 28

Takei Calls For Boycott
By: T'Bonz on Mar 27

April-May 2015 Trek Conventions And Appearances
By: T'Bonz on Mar 27

Quinto TV Alert
By: T'Bonz on Mar 26

Shatner Remembers Nimoy
By: T'Bonz on Mar 26

Star Trek Delta Coin Pouches
By: T'Bonz on Mar 25

Takei Museum Fundraiser In Progress
By: T'Bonz on Mar 25

Star Trek 3 Villain?
By: T'Bonz on Mar 25

Montgomery Comic Book Signing
By: T'Bonz on Mar 24

Mulgrew To Receive Award
By: T'Bonz on Mar 24


Welcome! The Trek BBS is the number one place to chat about Star Trek with like-minded fans. Please login to see our full range of forums as well as the ability to send and receive private messages, track your favourite topics and of course join in the discussions.

If you are a new visitor, join us for free. If you are an existing member please login below. Note: for members who joined under our old messageboard system, please login with your display name not your login name.


Go Back   The Trek BBS > Lounges & General Chat > Miscellaneous

Miscellaneous Discussion of non-Trek topics.

Reply
 
Thread Tools
Old November 29 2013, 12:06 AM   #1
Candlelight
Admiral
 
Candlelight's Avatar
 
Location: New Zealand
Comet ISON has been destroyed

http://www.bbc.co.uk/news/science-environment-25143861

Comet Ison was severely battered in its encounter with the Sun, and largely destroyed.
Telescopes saw the giant ball of ice and dust disappear behind the star, but only a dull streamer emerge.
Astronomers continued to search for the object, but it eventually became clear that the much vaunted "Comet of the Century" had gone out with a whimper.
Despite its great size, Ison was probably torn apart in the immense heat and tidal forces so close to the Sun.
The European Space Agency's experts on the Soho Sun-watching satellite called the death of the comet at about 21:30 GMT.
"Our Soho scientists have confirmed, Comet Ison is gone," Esa's twitter feed announced.
Shame. Was hoping for the same view we had with Comet McNaught in 2007.
__________________
"I'd rather be judged by twelve than carried by six."
Candlelight is offline   Reply With Quote
Old November 29 2013, 12:13 AM   #2
trekkiedane
Admiral
 
trekkiedane's Avatar
 
Location: I'll let you know when I get there.
Send a message via Windows Live Messenger to trekkiedane
Re: Comet ISON has been destroyed

There's a video here: http://spaceweather.com/
__________________
This post currently has no subtitles.
trekkiedane is offline   Reply With Quote
Old November 29 2013, 01:06 AM   #3
Davros
Fleet Admiral
 
Davros's Avatar
 
Location: Kaled bunker, Skaro
Re: Comet ISON has been destroyed

I guess since it will now never be a danger to Earth I have to go with this being a good thing. [not that it would have hit us this time]
__________________
"Taxes are the price we pay for a civilized society," -Oliver Wendell Holmes
Davros is offline   Reply With Quote
Old November 29 2013, 01:10 AM   #4
Timewalker
Cat-lovin', Star Trekkin' Time Lady
 
Timewalker's Avatar
 
Location: In many different universes, simultaneously.
Re: Comet ISON has been destroyed



Poor comet. I didn't get to see it due to snowstorms here.
__________________
"Let's give it to Riker. He'll eat anything!"

For some great Original Series fanfic, check out the Valjiir Continuum!
Timewalker is offline   Reply With Quote
Old November 29 2013, 02:38 AM   #5
Candlelight
Admiral
 
Candlelight's Avatar
 
Location: New Zealand
Re: Comet ISON has been destroyed

It was too low on the horizon for us to see (not that it would be invisible, but we ALWAYS have a band of cloud on the horizon where we are).

Some people in Auckland got photos though.
__________________
"I'd rather be judged by twelve than carried by six."
Candlelight is offline   Reply With Quote
Old November 29 2013, 02:42 AM   #6
Fatal Einstein
Cadet
 
Re: Comet ISON has been destroyed

I was hoping for the end of the world. How disappointing, now I'll have to go to work on Monday.
Fatal Einstein is offline   Reply With Quote
Old November 29 2013, 08:51 AM   #7
Candlelight
Admiral
 
Candlelight's Avatar
 
Location: New Zealand
Re: Comet ISON has been destroyed

http://www.bbc.co.uk/news/science-environment-25143861

Comet Ison, or some part of it, may have survived its encounter with the Sun, say scientists.
The giant ball of ice and dust was initially declared dead when it failed to re-emerge from behind the star with the expected brightness.
All that could be seen was a dull smudge in telescope images - its nucleus and tail assumed destroyed.
But recent pictures have indicated a brightening of what may be a small fragment of the comet.
Astronomers admit to being surprised and delighted, but now caution that anything could happen in the coming hours and days.
This remnant of Ison could continue to brighten, or it could simply fizzle out altogether.
Karl Battams wrote on the Nasa Comet Ison Observing Campaign blog: "It does appear that at least some small fraction of Ison has remained in one piece and is actively releasing material.
"We have no idea how big this nucleus is, if there is indeed one. If there is a nucleus, it is still too soon to tell how long it will survive.
"If it does survive for more than a few days, it is too soon to tell if the comet will be visible in the night sky."
The European Space Agency, too, which had been among the first organisations to call the death of Ison, has had to re-assess the situation. A small part of the nucleus may be intact, its experts say.
How much of the once 2km-wide hunk of dirty ice could have survived is impossible to say.
Here's hoping.
__________________
"I'd rather be judged by twelve than carried by six."
Candlelight is offline   Reply With Quote
Old November 29 2013, 09:38 AM   #8
rhubarbodendron
Commodore
 
rhubarbodendron's Avatar
 
Location: milky way, outer spiral arm, Sol 3
Re: Comet ISON has been destroyed

Cheer up, everyone! Ison only hid. NASA and ESA re-discovered it. Here is the first pic of it outside the corona:



source: http://www.br.de/themen/wissen/komet...12-s1-114.html [in German]

The trajectory didn't change much (see the video posted by trekkiedane) which indicates that there was no really significant loss of matter. Had it crumbled, the parts would now fly faster and in a much wider curve.*

And that a huge snowball sheds a few lbs when brushing something really hot was to be expected.

At any rate, those of us who haven't seen Ison yet get another chance in a few days, shortly before sunrise

_______
* faster because E = (m*v²) : 2 and since E is a constant, the velovity must rise when the mass gets less.

And wider because in a light object the centripetal force would work less well than in a heavy one Fcent. = (m*v²) : r

(admittedly, that last formula is only an approximation. It is true only in very short time frames. But the basic tendency is the same and a single day is damned short in cosmic dimensions)
__________________
a hug a day keeps the psychiatrist away

Last edited by rhubarbodendron; November 29 2013 at 01:51 PM.
rhubarbodendron is offline   Reply With Quote
Old November 29 2013, 08:07 PM   #9
trekkiedane
Admiral
 
trekkiedane's Avatar
 
Location: I'll let you know when I get there.
Send a message via Windows Live Messenger to trekkiedane
Re: Comet ISON has been destroyed

Spaceweather has a new video up: http://spaceweather.com/

And then there is this: http://vimeo.com/80568171
__________________
This post currently has no subtitles.
trekkiedane is offline   Reply With Quote
Old December 2 2013, 09:53 AM   #10
rhubarbodendron
Commodore
 
rhubarbodendron's Avatar
 
Location: milky way, outer spiral arm, Sol 3
Re: Comet ISON has been destroyed

German science news claim that it suffered severe damage but that there must still be some pretty massive thing sticking in the gas/dust cloud. Interestingly, it does not shed much mass anymore (which means that most of its volatile matter must have gotten pulled away by the sun. I think we can assume that this was the ice and steam surrounding the comet and that what's left now is a solid stone core.)

The surrounding gas and dust is still too thick to look through it at the core. The leftovers of the comet will not be visible to the naked eye anymore (a pity!) and it's constantly getting darker but at least it still flies on.
I think technically it's now something between a comet and an asteroid.

Source: http://www.ndr.de/regional/ison101.html (in German)
__________________
a hug a day keeps the psychiatrist away
rhubarbodendron is offline   Reply With Quote
Old December 2 2013, 01:45 PM   #11
Australis
Writer
 
Australis's Avatar
 
Location: The Electric Age
Re: Comet ISON has been destroyed

Sorry, little dim, if we can see it, will it be in the morning or evening sky?
__________________
1984? We're way beyond that!
Australis is offline   Reply With Quote
Old December 2 2013, 07:37 PM   #12
rhubarbodendron
Commodore
 
rhubarbodendron's Avatar
 
Location: milky way, outer spiral arm, Sol 3
Re: Comet ISON has been destroyed

Shortly before sunrise, if I am not completely mistaken.

Its current location is here:
http://www.heavens-above.com/comet.a...&alt=10&tz=EST
(the time is set to NY (EST)) - if you PM me your precise location, I can send you the coordinates and times for your town
__________________
a hug a day keeps the psychiatrist away
rhubarbodendron is offline   Reply With Quote
Old December 3 2013, 02:47 AM   #13
Australis
Writer
 
Australis's Avatar
 
Location: The Electric Age
Re: Comet ISON has been destroyed

Close enough to Sydney, Australia, as to make no difference.

I remember when I was a kid seeing Comet Bennett in 1970, that was spectacular, a clear autumn moring in outback Australia. I want to relive that.
__________________
1984? We're way beyond that!
Australis is offline   Reply With Quote
Old December 3 2013, 09:52 AM   #14
rhubarbodendron
Commodore
 
rhubarbodendron's Avatar
 
Location: milky way, outer spiral arm, Sol 3
Re: Comet ISON has been destroyed

here's the link for Sydney: http://www.heavens-above.com/comet.a...tz=AEST&cul=en

Do you have a decent telescope? The comet is only a mag 5.4 now and steadly fading.
__________________
a hug a day keeps the psychiatrist away
rhubarbodendron is offline   Reply With Quote
Old December 3 2013, 12:59 PM   #15
Australis
Writer
 
Australis's Avatar
 
Location: The Electric Age
Re: Comet ISON has been destroyed

Thanks. No telescope, but I'll rub along.
__________________
1984? We're way beyond that!
Australis is offline   Reply With Quote
Reply

Bookmarks

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump



All times are GMT +1. The time now is 06:08 PM.

Powered by vBulletin® Version 3.8.6
Copyright ©2000 - 2015, Jelsoft Enterprises Ltd.
FireFox 2+ or Internet Explorer 7+ highly recommended.