Waxing Crescent

by Tom March. 31, 2009 6938 views

A waxing crescent moon??sometimes called a ??young moon???is always seen in the west after sunset. At this moon phase, the Earth, moon and sun are located nearly on a line in space. If they were more precisely on a line, as they are at new moon, we wouldn??t see the moon. The moon would travel across the sky during the day, lost in the sun??s glare. Instead, a waxing crescent moon is seen one day to several days after new moon. It rises one hour to several hours behind the sun and follows the sun across the sky during the day. When the sun sets, and the sky darkens, the moon pops into view in the western sky.

Because the waxing crescent moon is nearly on a line with the Earth and sun, the ??day side? is facing mostly away from us. We see only a slender fraction of the day side: a crescent moon. Each evening, because the moon is moving eastward in orbit around Earth, the moon appears farther from the sunset glare. Each evening, as the moon??s orbital motion carries it away from the Earth/sun line, we see more of the moon??s day side. Thus the crescent in the west after sunset appears to wax, or grow fatter each evening.

Note that a crescent moon has nothing to do with Earth??s shadow on the moon. The only time Earth??s shadow can fall on the moon is at full moon, during a lunar eclipse. There IS a shadow on a crescent moon, but it??s the moon??s OWN shadow. Night on the moon happens on the part of the moon submerged in the moon??s own shadow. Likewise, night on Earth happens on the part of Earth submerged in Earth??s own shadow.

You sometimes see a pale glow on the darkened portion (night side) of a crescent moon. This glow is due to light reflected from Earth??s day side. It??s called ??earthshine.?

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Pintã©R Orsi 8 years, 1 month ago

your moon photos are always amazing :)

8 years, 1 month ago Edited
Mel 8 years, 1 month ago

Wow .... what an amazing shot.

8 years, 1 month ago Edited
Tim 8 years, 1 month ago

Brilliant!

8 years, 1 month ago Edited
Anka 8 years, 1 month ago

Awesome shot!!!

8 years, 1 month ago Edited
Leanne......Melbourne, Australia 8 years, 1 month ago

Great post!

8 years, 1 month ago Edited
Flowerstone 8 years, 1 month ago

Stunning capture Tom!!! I like it!

8 years, 1 month ago Edited
Carey 8 years, 1 month ago

interesting! that's an amazing photo! :)

8 years, 1 month ago Edited
Anca Tudosa 8 years, 1 month ago

added to my fav!

8 years, 1 month ago Edited
Arie 8 years, 1 month ago

Lovely moon shot

8 years, 1 month ago Edited
Nes 8 years, 1 month ago

amazing shot! I never get such good pictures of the moon...
and interesting story too ^^

8 years, 1 month ago Edited
Sachiko 8 years, 1 month ago

I seem to be in the quiet outer space when I enlarge a photograph.

8 years, 1 month ago Edited
Kecskemétiné Nelli 8 years, 1 month ago

Just perfect.. =)

8 years, 1 month ago Edited
Camille 8 years, 1 month ago

oops - the texte is a bit too long for me ... :-(
but the crescent is beautiful !

8 years, 1 month ago Edited
Sara G 8 years, 1 month ago

Awesome is the word from me!

8 years, 1 month ago Edited
Miclaud 8 years, 1 month ago

Amazing!!! I like it!

8 years, 1 month ago Edited
Christa 8 years, 1 month ago

Wow, a lesson of astronomy.. and a picture like from NASA. Well done!

8 years, 1 month ago Edited
Andrea Kennard 8 years, 1 month ago

Stunning photo!

8 years, 1 month ago Edited
Marco 8 years, 1 month ago

Just a word: WOW!

8 years, 1 month ago Edited
Ricardo 8 years, 1 month ago

hmm!
Thanks for the information :)
Wonderful moon ;P

8 years, 1 month ago Edited
Zosia/Sophie 8 years, 1 month ago

It's fantastic! Amazing moon..

8 years, 1 month ago Edited
Paul 8 years, 1 month ago

Simply amazing.....

8 years, 1 month ago Edited
Mehdi Saharkhiz 8 years, 1 month ago

amazing

8 years, 1 month ago Edited
Jacki 8 years, 1 month ago

Good work... someday I will successfully capture the moon!

8 years, 1 month ago Edited
Tonya 8 years, 1 month ago

Hey, thanks for the lesson. I will never remember all of that, so I hope that there won't be a pop quiz! lol Great photo!

8 years, 1 month ago Edited
Leocheung 8 years, 1 month ago

An informative post with a fantastic picture.

8 years, 1 month ago Edited
Jennye 8 years, 1 month ago

fantastic shot!!
and thanks for the info!

8 years, 1 month ago Edited
Marsha 8 years, 1 month ago

That's just beautiful - a lot of interesting information, too!

8 years, 1 month ago Edited
Walter 8 years, 1 month ago

Awesome! :-)

8 years, 1 month ago Edited
Brian 8 years, 1 month ago

Cool shot and information!

8 years, 1 month ago Edited
Jet28 8 years, 2 months ago

I never knew that - thanks :-) Great shot!

8 years, 2 months ago Edited
Finbarr 8 years, 2 months ago

Stunning shot !!!!! great post !!

8 years, 2 months ago Edited
Ines 8 years, 2 months ago

Fantastic capture Tom!!! And interesting information too :)

8 years, 2 months ago Edited
Kilian 8 years, 2 months ago

wow! that's fantastic! now time to post your photos of the other planets too... :)

8 years, 2 months ago Edited
Jumiella 8 years, 2 months ago

Awesome shot, Tom! Thanks for the introduction to subject.

8 years, 2 months ago Edited
Pete 8 years, 2 months ago

great post

8 years, 2 months ago Edited
Gillian 8 years, 2 months ago

Your moon shots are really getting good now! And all that luna information too!

8 years, 2 months ago Edited
Gonia 8 years, 2 months ago

it looks wonderfull on your picture!bravo Tom!

8 years, 2 months ago Edited
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