Search found 13 matches

by wildespace
Sun Feb 27, 2022 6:16 am
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: Earthrise 1: Historic Image Remastered (2022 Feb 27)
Replies: 24
Views: 13090

Re: APOD: Earthrise 1: Historic Image Remastered (2022 Feb 27)

A bit cheeky, as I submitted my own processing of this image to APOD a couple of weeks ago, but they decided to post someone elses' work. No problemo. :)
Gonna attach a couple of images from my own processing.

https://imgur.com/a/w0NRsNL
by wildespace
Sun Mar 01, 2020 3:59 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: A Hole in Mars (2020 Mar 01)
Replies: 28
Views: 8954

Re: APOD: A Hole in Mars (2020 Mar 01)

SpaceCadet wrote: Sun Mar 01, 2020 12:37 pm How is martian life a possibility when there isn't any atmosphere to speak of?
Some forms of like don't require oxygen (or any atmosphere really). Thermal vents, even solid rocks. There are organisms feeding off chemical composition.
by wildespace
Sun Mar 01, 2020 7:24 am
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: A Hole in Mars (2020 Mar 01)
Replies: 28
Views: 8954

Re: APOD: A Hole in Mars (2020 Mar 01)

Very cool. I think the "crater" is the result of a collapse. Here's a zoomed in view, with some enhancement of the dark part; seems like there's a pile of sand or soil at the bottom of the hole.
Image
by wildespace
Sun Mar 03, 2019 8:37 am
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: The Orion Bullets (2019 Mar 03)
Replies: 13
Views: 3995

Re: APOD: The Orion Bullets (2019 Mar 03)

One article explains: "At the center of the giant butterfly-like feature is IRc2, a star 30 times more massive than the sun which is in the process of forming. A strong wind with a speed of more than 100 kilometers per second is blowing out from IRc2, evacuating the butterfly-like cavity and al...
by wildespace
Wed Dec 26, 2018 5:55 am
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: Earthrise 1: Historic Image Remastered (2018 Dec 24)
Replies: 21
Views: 5879

Re: APOD: Earthrise 1: Historic Image Remastered (2018 Dec 24)

1968 was too far back to simulate but one can extrapolate back from 2006 to 1987 to ~1968: Earthrise2006.jpgEarthrise1987.jpg Simulated Stellarium view, as seen from the Moon around the time the first photo was taken: https://i.imgur.com/BfRzUgz.jpg The brightest star in the photo would then be Reg...
by wildespace
Mon Dec 24, 2018 12:14 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: Earthrise 1: Historic Image Remastered (2018 Dec 24)
Replies: 21
Views: 5879

Re: APOD: Earthrise 1: Historic Image Remastered (2018 Dec 24)

With the sunlit Moon and Earth in the view, you wouldn't be able to see stars there. Stars are very faint and require dark adaptation. On the topic of the image processing, this is a simple but great idea to use colour from another image for a black&white one. Surprised it hadn't been done befor...
by wildespace
Sat Apr 21, 2018 10:12 am
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: TESS Launch Close Up (2018 Apr 21)
Replies: 29
Views: 114345

Re: APOD: TESS Launch Close Up (2018 Apr 21)

Amazing photo! The author took two photos, and I took the liberty of stitching them together using ICE: http://ibb.co/dvOTu7 https://scontent-lht6-1.xx.fbcdn.net/v/t1.0-9/31047744_10155878130144843_7807785369843584916_n.jpg?_nc_cat=0&_nc_eui2=v1%3AAeFkF5CquSkeQn-gES5uc2BUdJMQUk1IvhRrbp4GykKM0q9a...
by wildespace
Sat Apr 21, 2018 10:05 am
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: NGC 7635: The Bubble Nebula (2018 Apr 19)
Replies: 25
Views: 104259

Re: APOD: NGC 7635: The Bubble Nebula (2018 Apr 19)

You can tell the expanding bubble encountered strong resistance at around 10-11 o'clock, hence the thick shells and strands of interstellar material. Around 2 to 6 o'clock there was little resistance and that part bubble expanded considerably further. Plus, of course, there's the proper motion of th...
by wildespace
Fri Apr 20, 2018 1:27 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: NGC 7635: The Bubble Nebula (2018 Apr 19)
Replies: 25
Views: 104259

Re: APOD: NGC 7635: The Bubble Nebula (2018 Apr 19)

I don't fully understand the reprocessing... process. Digital colour images are composed of the red, green, and blue channels. Hubble's narrowband images are created by assigning specific ionised gasses (like NII, Ha, and OIII) to the red, green, and blue channels respectively, resulting in a false...
by wildespace
Thu Apr 19, 2018 9:33 am
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: NGC 7635: The Bubble Nebula (2018 Apr 19)
Replies: 25
Views: 104259

Re: APOD: NGC 7635: The Bubble Nebula (2018 Apr 19)

APOD Robot wrote: This sharp, tantalizing view of the cosmic bubble is a composite of Hubble Space Telescope image data from 2016, reprocessed to present the nebula's intense narrowband emission in an approximate true color scheme . "Approximate" is right. The ionizing O-type star is defi...
by wildespace
Sun Apr 08, 2018 8:24 pm
Forum: The Observation Deck: Latest Sky Photography
Topic: Submissions: 2018 April
Replies: 78
Views: 260545

Re: Submissions: 2018 April

NGC 7635 The Bubble Nebula (reprocessed Hubble image in true colours) Combined in this image is the Hubble's narrowband image, and colour information from a true-colour image of the Bubble Nebula found at https://upload.wikimedia.org/wikipedia/commons/8/85/NGC7635_Bubble_Nebula_from_the_Mount_Lemmon...
by wildespace
Mon Mar 11, 2013 10:03 am
Forum: The Observation Deck: Latest Sky Photography
Topic: Submissions: 2013 March
Replies: 153
Views: 83533

Re: Submissions: 2013 March

Saturn's moon Rhea, as seen by NASA's Cassini spacecraft on its last flyby of this moon on March 10th 2013.

This true-colour image has been created by me (Maksim Kakitsev) out of raw Cassini images found at http://saturn.jpl.nasa.gov/photos/raw/