Free Republic
Browse · Search
General/Chat
Topics · Post Article

Skip to comments.

Astronomy Picture of the Day - Quarter Moons
NASA ^ | 21 Oct, 2023 | Image Credit & Copyright: Marcella Giulia Pace

Posted on 10/21/2023 12:21:46 PM PDT by MtnClimber

Explanation: Half way between New Moon and Full Moon is the Moon's first quarter phase. That's a quarter of the way around its moonthly orbit. At the first quarter phase, half the Moon's visible side is illuminated by sunlight. For the Moon's third quarter phase, half way between Full Moon and New Moon, sunlight illuminates the other half of the visible lunar disk. At both first and third quarter phases, the terminator, or shadow line separating the lunar night and day, runs down the middle. Near the terminator, long shadows bring lunar craters and mountains in to sharp relief, making the quarter phases a good time to observe the Moon. But in case you missed some, all the quarter phases of the Moon and their calendar dates during 2022 can be found in this well-planned array of telephoto images. Of course, you can observe a first quarter Moon tonight.


TOPICS: Astronomy; Astronomy Picture of the Day; Science
KEYWORDS: nasa
To be added or removed from the Astronomy Picture of the Day ping list please send me a request via "Private Reply" (Mail).

For more detail go to the link and click on the image for a high definition image. You can then move the magnifying glass cursor then click to zoom in and click again to zoom out. When zoomed in you can scan by moving the side bars on the bottom and right side of the image.

1 posted on 10/21/2023 12:21:46 PM PDT by MtnClimber
[ Post Reply | Private Reply | View Replies]

To: MtnClimber

2 posted on 10/21/2023 12:22:10 PM PDT by MtnClimber (For photos of Colorado scenery and wildlife, click on my screen name for my FR home page.)
[ Post Reply | Private Reply | To 1 | View Replies]

To: MtnClimber

Wow.


3 posted on 10/21/2023 12:22:20 PM PDT by No name given (Anonymous is who you’ll know me as)
[ Post Reply | Private Reply | To 2 | View Replies]

To: 21stCenturion; 21twelve; 4everontheRight; abb; AFB-XYZ; AFPhys; Agatsu77; America_Right; ...
Pinging the APOD list.

🪐 🌟 🌌 🍔


4 posted on 10/21/2023 12:22:55 PM PDT by MtnClimber (For photos of Colorado scenery and wildlife, click on my screen name for my FR home page.)
[ Post Reply | Private Reply | To 2 | View Replies]

To: MtnClimber

Quarter moon in a ten cent town
It’s time for me to lay my heartaches down
Saturday night I’m gonna make myself a name
Take a month of Sundays to try and explain


5 posted on 10/21/2023 12:24:23 PM PDT by Lonesome in Massachussets (Perdicaris alive or Raisuli dead!)
[ Post Reply | Private Reply | To 2 | View Replies]

To: MtnClimber

Kindy cheesy shots....


6 posted on 10/21/2023 12:32:34 PM PDT by Sacajaweau ( )
[ Post Reply | Private Reply | To 1 | View Replies]

To: MtnClimber
Of course, you can observe a first quarter Moon tonight.

I looked for it but couldn't see it. It was raining.

7 posted on 10/22/2023 8:44:53 AM PDT by Deaf and Discerning
[ Post Reply | Private Reply | To 1 | View Replies]

Disclaimer: Opinions posted on Free Republic are those of the individual posters and do not necessarily represent the opinion of Free Republic or its management. All materials posted herein are protected by copyright law and the exemption for fair use of copyrighted works.

Free Republic
Browse · Search
General/Chat
Topics · Post Article

FreeRepublic, LLC, PO BOX 9771, FRESNO, CA 93794
FreeRepublic.com is powered by software copyright 2000-2008 John Robinson