Search found 7 matches

by keir
Sun Oct 28, 2012 9:21 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: Phobos: Doomed Moon of Mars (2012 Oct 28)
Replies: 44
Views: 13890

Re: APOD: Phobos: Doomed Moon of Mars (2012 Oct 28)

The striations running across the moon appear in many instances to be joining lines of impact crators. This especially noticable top right. Also perhaps emanating from the mjar right crator. Could this be like an "atmospheric" erosion where the atmosphere is something really erosive like v...
by keir
Mon Sep 19, 2011 4:56 am
Forum: The Library: Information Desk and Educational Resources
Topic: What does a sunspot look like?
Replies: 4
Views: 3953

What does a sunspot look like?

Sun spots appear black presumably just because of the intensity contract with its surrounds.
Has anyone imaged a sunspot....is it possible?
by keir
Thu Feb 17, 2011 9:14 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: X Class Flare (2011 Feb 17)
Replies: 11
Views: 1824

Re: APOD: X Class Flare (2011 Feb 17)

I have heard that in the early 1900 solar flares interfered with telegraph operation, in one case where the telegraph would operate when the power was disconnected. This seems to me to be an apocalyptic omen. To what extent could these coronal mass ejections blow out electronics and power on earth? ...
by keir
Tue Jun 08, 2010 9:40 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: Falcon 9 Launches to Orbit (2010 Jun 08)
Replies: 70
Views: 7568

Re: APOD: Falcon 9 Launches to Orbit (2010 Jun 08)

Why is it that Falcon 9 is already ascending before the atdio countdowns has completed?
by keir
Mon Dec 22, 2008 11:18 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: Labtayt Sulci on Saturn's Enceladus (2008 Dec 22)
Replies: 4
Views: 2766

Enceladus plates

You can't really tell if the land masses are moving as plates on Earth or perhaps like giant bulldozers such as glaciers often do. If there was a crater impact right on one of the lines of the plate you could see what sort of displacement is made to the circular crater. From a distance there looks l...
by keir
Sun Jun 29, 2008 11:40 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: Opportunity's Shadow on Mars, 2nd most habitable? (29Jun08)
Replies: 30
Views: 10284

Shadow of robot on ice field?

The caption is mainly focussed on the shadow of the robot whereas the landscape appears to be a lanscape of frozen ice. Is that really ice or is it just an artifact of the photograph?
by keir
Tue Jun 03, 2008 8:19 am
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: Dark River of Antares (APOD 03 Jun 2008)
Replies: 24
Views: 9102

Dark River of Antares (APOD 03 Jun 2008)

Why are the stars radiating eight radial beams. I suppose this is an artifact of the camera iris whchc is a pity since it is not representative of some real aspect of the stars.