The Ongoing Astronomy Thread. - DPChallenge Forums

10/18/2013 05:40:07 PM · #101

Watch live tonight. Slooh telescope has a live event if the sky's are clear. I've been out a couple times and not seen ISON yet.

Canon 12x IS USM (S3 IS built-in Lens) -- 36-432mm (35mm EQ)

10/23/2013 03:20:54 PM · #102

How To Make A True-Color Landsat 8 Image

An excellent tutorial covering combining individual channels into a color image, and the use of Curves and Levels (and why you'd want to use both), with links to high-resolution satellite data to "practice" with.

Originally posted by Linked Tutorial:

Levels and curves adjustments both allow manipulation of the brightness and contrast of an image, just in slightly different ways. I use both together for 16-bit imagery since the combination gives maximum flexibility. Levels provides the initial stretch, expanding the data to use the full range of values. Then I use curves to fine-tune the image, matching it to our nonlinear perception of light.

11/14/2013 09:18:52 PM · #103

If you are up early enough it is a good time to see a comet, ISON.

11/14/2013 09:53:45 PM · #104

Thanks Jm. There was another one right near it in the eastern sky about a week ago, that was brighter than Ison, but it's been cloudy here every night.
The other one is near Regulus. I saw an article about it but have not been able to find that article again. I believe I saw it in Sky News, or Space .com .

Message edited by author 2013-11-14 21:58:21.

11/15/2013 03:30:19 AM · #105

More comet ISON info.

Canon 12x IS USM (S3 IS built-in Lens) -- 36-432mm (35mm EQ)

11/15/2013 07:36:29 AM · #106

More on ISON from NASA

ISON observing campaign

Canon 12x IS USM (S3 IS built-in Lens) -- 36-432mm (35mm EQ)

11/15/2013 01:57:15 PM · #107

Two Comets to fly by Mercury

11/15/2013 03:04:24 PM · #108

Comet Lovejoy is out there this month too.
Comet Lovejoy 2013
For the techies, here's a good link for comet watchers.
Comet Weekly
Click on any of the comet names for detailed info or history of recent comets.

Message edited by author 2013-11-15 15:10:53.

11/15/2013 04:16:40 PM · #109

Was up and saw Comet Lovejoy. Did a drawing, composite of a photograph and what I could see in the small scope.

Couldn't see ISON, Fog and high clouds were just enough to obscure it.
Hopefully it will brighten even further.

Canon 12x IS USM (S3 IS built-in Lens) -- 36-432mm (35mm EQ)

11/20/2013 01:52:32 PM · #110

Came across another tutorial on using Photoshop to create Landsat images from the public-domain data.

And a tutorial using open source tools ...

Message edited by author 2013-11-20 13:58:34.

Canon 12x IS USM (S3 IS built-in Lens) -- 36-432mm (35mm EQ)

11/20/2013 10:07:32 PM · #111

Well, it took over an hour to download an "appropriate" data set, but those instructions seem to work perfectly ... though I haven't tried playing with the other bands (to create false-color images) yet. Here is a 100% crop, without the panchromatic (or any other) sharpening step described in the tutorial ...

Canon 12x IS USM (S3 IS built-in Lens) -- 36-432mm (35mm EQ)

11/22/2013 07:04:44 PM · #112

NOVA: At the Edge of Space -- program on sprites and auroras ... you can watch it online, some amazing photography.

11/22/2013 07:23:36 PM · #113

This is interesting. [url=Comet ISON interactive model]Comet ISON interactive model[/url], looks good for viewing the comet after it rounds the sun.

11/22/2013 07:24:05 PM · #114

Whoops

11/22/2013 07:25:05 PM · #115

ISON Here it is.

11/28/2013 03:20:24 PM · #116

RIP, Ison. Nov 28 2013
I guess we will not be getting any spectacular images of this one in Dec. The Sun has trashed it.
BBC, Science

Message edited by author 2013-11-28 15:29:03.

Tamron SP AF 28-75mm f/2.8 XR Di for Canon

11/28/2013 06:03:11 PM · #117

To bad, was looking forward to seeing it after it rounded the sun. Spaceweather has a good update. Movie.

PGerst

Canon EOS-20D

11/28/2013 10:35:43 PM · #118

Yup...got the alert from Spaceweather today...quite sad.

Originally posted by MelonMusketeer:

RIP, Ison. Nov 28 2013
I guess we will not be getting any spectacular images of this one in Dec. The Sun has trashed it.
BBC, Science

kirbic

Canon EOS R5

Canon RF 24-70mm f/2.8 L IS

11/28/2013 10:44:11 PM · #119

Well, *something* came back out, but not what went in, LOL. Too bad we won't get a December show. But pretty darn cool anyway. We got to see the one and only trip that this one made in from the Oort cloud.

Tamron SP AF 28-75mm f/2.8 XR Di for Canon

11/29/2013 02:49:30 PM · #120

This could be good news. Fingers crossed.
Video of the "something" emerging.

PGerst

Canon EOS-20D

11/29/2013 03:19:09 PM · #121

Did the path change? From what I would tell, we should be able to view it in January.

Originally posted by kirbic:

Canon 12x IS USM (S3 IS built-in Lens) -- 36-432mm (35mm EQ)

11/29/2013 07:06:40 PM · #122

For NASA, Black Hole Friday beats Black Friday deals (PBS News summary)

Originally posted by Linked Article:

If you're sick of everything Black Friday, NASA has an alternative: Black Hole Friday. Throughout the day, they'll be tweeting facts and images about black holes, and giving Black Friday forgoers a reason to celebrate.