Search found 19 matches

by sidd
Fri Jul 26, 2013 9:06 am UTC
Forum: Individual XKCD Comic Threads
Topic: 1190: "Time"
Replies: 107238
Views: 50161191

Re: 1190: "Time"

Capella (in Auriga) is the very bright star in the lower left. Aldeberan (in Taurus) is in the lower right. Pleiades above and left of Taurus. Mirphak (in Perseus) is above Capella. Algol is to the right of Mirphak. Algol is a famous variable (eclipsing binary in this case) star discovered way back...
by sidd
Fri Jul 26, 2013 8:03 am UTC
Forum: Individual XKCD Comic Threads
Topic: 1190: "Time"
Replies: 107238
Views: 50161191

Re: 1190: "Time"

Assuming that it is the year 13291, we're looking roughly ESE. The Sun has *just* disappeared below the horizon behind us.

Assuming it is still Apr or May, we should see Mars in Gemini, which is just below the horizon and in centre of frame.


Astronomers may molpy down.


Aw.
by sidd
Fri Jul 19, 2013 3:34 am UTC
Forum: Individual XKCD Comic Threads
Topic: 1190: "Time"
Replies: 107238
Views: 50161191

Re: 1190: "Time"

Here's a nice animation showing the Messinian salinity crisis about 6 million years ago ("it has happened before, when our parents were learning to walk upright"), and how Gibraltar burst like a damn. The video even shows how the land bridge aided the movement of baobabs an molpys. http://...
by sidd
Sun Jun 30, 2013 3:23 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1190: "Time"
Replies: 107238
Views: 50161191

Re: 1190: "Time"

Has anybody calculated the rotational pole from the movement and compared it with an extension of the star field to see where Polaris is with respect to that pole? That will fix the phase of precession we are in, and confirm the date. I've done this on paper with a compass. I ended up with the cele...
by sidd
Sun Jun 30, 2013 12:28 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1190: "Time"
Replies: 107238
Views: 50161191

Re: 1190: "Time"

And can you (or someone else) also confirm that 5 minutes per frame is still accurate? (I.e., did the sky earth indeed turn about 75 × 360/(24×12) = 93.75 degrees?) ~6m45s newpix is my estimate. I used the distance between θ Piscium and 7 Piscium as yardstick for a single frame, and these two stars...
by sidd
Sun Jun 30, 2013 11:34 am UTC
Forum: Individual XKCD Comic Threads
Topic: 1190: "Time"
Replies: 107238
Views: 50161191

Re: 1190: "Time"

Night will be about 12 hours 40 minutes long, so at 5 minutes per frame, the night should be 152 frames long. If we are currently 75 frames in, then there should be 77 frames left. almost exactly half way! day length calculator,I selected a location between 39 and 40 degrees north, and set the date...
by sidd
Sun Jun 30, 2013 5:16 am UTC
Forum: Individual XKCD Comic Threads
Topic: 1190: "Time"
Replies: 107238
Views: 50161191

Re: 1190: "Time"

Just for kicks, here's more proof of the ~10,000 year hypothesis.


Spoiler:
Image
by sidd
Sun Jun 30, 2013 12:00 am UTC
Forum: Individual XKCD Comic Threads
Topic: 1190: "Time"
Replies: 107238
Views: 50161191

Re: 1190: "Time"

Here's my animation - just the meteor frames, no gamma correction: http://forums.xkcd.com/download/file.php?id=37317&mode=view Thanks to this, I have just noticed a mustard star that is visible only when the meteor is there. :shock: Ooh, I see it, too. http://forums.xkcd.com/download/file.php?i...
by sidd
Sat Jun 29, 2013 6:41 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1190: "Time"
Replies: 107238
Views: 50161191

Re: 1190: "Time"

...mustard star... ... as it turns out, was Zeta Sagittarii B, and not mustard at all. The real mystery is why it was removed. That seals the case for far-future. Now to see if there are any other dates besides 13291-04-10. I've asked this before, but I don't think any of the resident astro...
by sidd
Sat Jun 29, 2013 5:48 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1190: "Time"
Replies: 107238
Views: 50161191

Re: 1190: "Time"

The biggest reason supporting the far-future date is the motion of the stars (such as epsilon Scorpii and alpha Ophiuchi). For the constellations to have changed noticeably requires at least thousands of years of motion, and with the pixel sizes here only gives an estimate good to maybe a thousand ...
by sidd
Sat Jun 29, 2013 4:57 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1190: "Time"
Replies: 107238
Views: 50161191

Re: 1190: "Time"

I don't know PyEphem (nor Python actually, but that's easy enough to follow)... so what does it output exactly? the dates where the given stars are "in" the correct constellations? So I guess it's not taking into account the displacement of the celestial equator (which is what lead in the...
by sidd
Sat Jun 29, 2013 4:13 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1190: "Time"
Replies: 107238
Views: 50161191

Re: 1190: "Time"

Consider me nerdsniped. The far-futurist Randallversian theory is premised on what looks like axial precession, but could well just be a rendering mistake. In the spirit of keeping anti-far-futurist Randallversians happy, I started looking for a suitable near future date. To help the search, I'm try...
by sidd
Sat Jun 29, 2013 1:43 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1190: "Time"
Replies: 107238
Views: 50161191

Re: 1190: "Time"

IceIsNice wrote:A little disappointed not to see any meteors yet. Just one streaking across -- that isn't too much to ask for, is it?


A comet would be nice. 13291 is almost exactly 150 Halley's orbits from now: 1986 + 75.3 * 150 = 13281
by sidd
Sat Jun 29, 2013 1:22 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1190: "Time"
Replies: 107238
Views: 50161191

Re: 1190: "Time"

For everyone without awesome plannetarium software to ogle, compare:

Stellarium western sky on 13291-04-10 @ 40oN:

Spoiler:
stellarium-000.png


NoMouse's stitched image:

NoMouse wrote:
Spoiler:
The attachment 2394-2431_stitch-planar.png is no longer available

Image

1 Freeware!
by sidd
Sat Jun 29, 2013 10:50 am UTC
Forum: Individual XKCD Comic Threads
Topic: 1190: "Time"
Replies: 107238
Views: 50161191

Re: 1190: "Time"

Someone should double check 2013 to see when jupiter lines up in this position this year. If this only happens at dates when other things like venus dont match then we can 100% discount 2013. There's a few things that make the 2013 date seem unlikely. 1. The entire sky is shifted north, so that Sco...
by sidd
Sat Jun 29, 2013 10:14 am UTC
Forum: Individual XKCD Comic Threads
Topic: 1190: "Time"
Replies: 107238
Views: 50161191

Re: 1190: "Time"

Spoilered big image with stars matching: http://forums.xkcd.com/download/file.php?mode=view&id=37296&sid=f2a3f0febc0bb24d954921ab3ca96a99 ... and just to demonstrate the dual confirmation, here is the same process for Jupiter in Aquarius, same time and date: OTC Jupiter: OTC-Jupiter.png Ste...
by sidd
Sat Jun 29, 2013 8:15 am UTC
Forum: Individual XKCD Comic Threads
Topic: 1190: "Time"
Replies: 107238
Views: 50161191

Re: 1190: "Time"

My planet positions in Stellarium for 13291-04-14 are discrepant from others: 04-09 or 04-10 looks more accurate from what I can tell. By the 14th, Venus is completely out of position. stellarium-001.png Edit: For confirmation, the moon should appear in Taurus, west of Aldebaran, and will set in the...
by sidd
Fri Dec 08, 2006 6:32 am UTC
Forum: Individual XKCD Comic Threads
Topic: 0194: "Penises"
Replies: 130
Views: 42351

REDACTED
by sidd
Fri Dec 08, 2006 6:03 am UTC
Forum: Individual XKCD Comic Threads
Topic: 0194: "Penises"
Replies: 130
Views: 42351

REDACTED

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