Child-like pleasure in seeing ISS and detached Dragon capsule

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Discussion Overview

The discussion revolves around the enjoyment of observing celestial phenomena, specifically the International Space Station (ISS) and the Dragon capsule, as well as the concept of the Earth's shadow. Participants share personal experiences and reflections on stargazing, childhood memories related to space exploration, and the challenges of observing celestial events from light-polluted areas.

Discussion Character

  • Exploratory
  • Conceptual clarification
  • Debate/contested

Main Points Raised

  • One participant expresses a renewed interest in stargazing and shares their experience of observing the ISS and a Dragon capsule, noting the thrill of seeing them in the sky.
  • Another participant suggests that the Earth's shadow can be seen every time one looks at the moon, except during a full moon.
  • A later reply clarifies that the Earth's shadow on the moon is only visible during a lunar eclipse, and discusses the concept of the moon's shadow during its night phase.
  • Participants reflect on childhood memories related to space exploration, including experiences with the Columbia Space Shuttle and live communications from NASA.
  • One participant mentions interesting celestial alignments and occultations occurring soon, suggesting they are ideal for observation.

Areas of Agreement / Disagreement

There is disagreement regarding the visibility of the Earth's shadow on the moon, with some participants asserting it is visible at all times except during a full moon, while others clarify that it is only visible during a lunar eclipse. The discussion remains unresolved on this point.

Contextual Notes

Participants reference various sources and personal experiences, but there are limitations in the assumptions made about the visibility of the Earth's shadow and the definitions of related terms.

Who May Find This Useful

Individuals interested in astronomy, stargazing, and the experiences of observing celestial events may find this discussion engaging.

UsableThought
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Last time I looked at the stars for fun must have been when I was 6 or 7 or 8 years old - who knows. Somewhere I learned about the Big Dipper - whether from a parent or from passing through Grand Central Station - but not much more. Very recently I have realized that although I live in a rural-suburban area (lots of light pollution from a nearby small city), and so won't get particularly dark skies, there are still some enjoyable things to see. I'm at the "birding binoculars and a couple of beginner books" stage - augmented by iPad apps.

One thing I'd love to see is the Earth's shadow - and not just see it, but know what it is. Unfortunately where I am we don't have a good horizon view; however, reading about the shadow led me to reading also about visible ISS passes. The iPad apps and web pages make it easy to get notice of these. I had a good opportunity today with 42° max elevation just before dawn; it was a small but enjoyable thrill to see what I had read about.

What was really neat was that I saw it had a companion traveling with it, roughly 1° apart (pinkie finger width) and not nearly so bright. I looked online and this must have been the http://www.spacex.com/dragon sent up by SpaceX with supplies awhile ago; it had been detached ~45 min. earlier & moved away from the station w/ thrusters, prior to the SpaceX controllers sending it into its "de-orbit burn." Link to post on ISS blog: https://blogs.nasa.gov/spacestation/2017/09/17/dragon-released-carrying-science-and-gear-back-to-earth/

And here's a pic of what I saw, only from the ISS point of view:

exp53_spacex_dragon_release.jpg
 
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UsableThought said:
One thing I'd love to see is the Earth's shadow - and not just see it, but know what it is.
? Every time you look at the moon, you see the Earth's shadow (except on the one day per 28 when there's a full moon)
 
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My child memories go back to Columbia Space shuttle (when e.g. during its first mission I called a 900 number or something to hear the live on board communications (open NASA line, for the first time I think)). It was a lot of fun! It's dead now! :cry: (since 2003)
 
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UsableThought said:
Last time I looked at the stars for fun must have been when I was 6 or 7 or 8 years old - who knows.
Interesting alignments and occultations these days (Sept. 18-20), ideal for child and adult "early bird" observations, starting this morning (some parts of the world can still catch it! ...), tomorrow and wed (Sept. 20).
See:
https://www.physicsforums.com/threads/space-and-stuff.879196/page-19#post-5843621
 
phinds said:
? Every time you look at the moon, you see the Earth's shadow (except on the one day per 28 when there's a full moon)
The only time you see the Earth's shadow on the moon is during a lunar eclipse. The dark portion of the moon when it isn't full is the moon's shadow (I.e., lunar night), and the faint glow therein is Earth'shine: light reflected off the earth.
 
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TeethWhitener said:
The only time you see the Earth's shadow on the moon is during a lunar eclipse. The dark portion of the moon when it isn't full is the moon's shadow (I.e., lunar night), and the faint glow therein is Earth'shine: light reflected off the earth.
AAARRRGGG ! Nuts. I hate it when I'm stupid. Thanks though.
 
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