Search found 8 matches
- Thu Jan 06, 2011 10:10 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Sunrise, Moonrise (2011 Jan 06)
- Replies: 27
- Views: 3409
Re: APOD: Sunrise, Moonrise (2011 Jan 06)
Something in the camera or processing? No. I was a pro photographer for 20+ years, and this is NOT a camera trick. The Sun gets smaller as it rises. This is due to the amount of atmosphere and particles in the air that the light travels through. It does not happen every sunrise or sunset, but I have...
- Thu Jan 06, 2011 7:36 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Sunrise, Moonrise (2011 Jan 06)
- Replies: 27
- Views: 3409
Re: APOD: Sunrise, Moonrise (2011 Jan 06)
mikero2107 wrote:
Why does it look like the moon is moving slower than Sun?
In a 24 hour period, the Sun will be at approximately the same place in the sky. The Moon's orbit in 24 hours is approximately 15 degrees shorter. Therefore the Sun's apparent movement is faster.
Why does it look like the moon is moving slower than Sun?
In a 24 hour period, the Sun will be at approximately the same place in the sky. The Moon's orbit in 24 hours is approximately 15 degrees shorter. Therefore the Sun's apparent movement is faster.
- Thu Jan 06, 2011 7:25 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Sunrise, Moonrise (2011 Jan 06)
- Replies: 27
- Views: 3409
Re: APOD: Sunrise, Moonrise (2011 Jan 06)
This is another example of the Sun appearing slightly larger near the horizon than at altitude. Measuring it on my screen, the first complete image has the Sun at 1/4 (4/16th) of an inch in diameter. The Sun's image highest in the sky has a 3.5/16 diameter. This is due to the denser atmosphere near ...
- Tue Jul 14, 2009 10:57 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Moons and Jupiter (2009 Jul 14)
- Replies: 55
- Views: 8009
Re: Moons of Jupiter (7/14/09)
I am wondering what that speck of light is directly above Jupiter. I'm thinking it's a star, because it isn't in the plane of moons.
Great photo!
Great photo!
- Sat Jun 20, 2009 4:26 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: Moonrise Over Turkey (2009 June 16)
- Replies: 26
- Views: 8101
Re: Moonrise Over Turkey (2009 June 16)
Here is an easy way to personally determine the illusion that works fairly well: At moonrise, when the moon appears visually larger to you, stick up your thumb at arms length and hold it up to the moon. Remark the relative size of your thumb to the size of the moon. It is likely only slight larger ...
- Sat Jun 20, 2009 4:21 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: Moonrise Over Turkey (2009 June 16)
- Replies: 26
- Views: 8101
Re: Moonrise Over Turkey (2009 June 16)
Well, there you go again. I assume what you mean to say is that you have seen a sunrise where the Sun appeared to you to be at least twice the size that it appeared to you at noon. Somebody else might see it very differently, because it is just an illusion. Yes, Chris. It appeared to be twice the s...
- Sat Jun 20, 2009 6:02 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: Moonrise Over Turkey (2009 June 16)
- Replies: 26
- Views: 8101
Re: Moonrise Over Turkey (2009 June 16)
Chris... We are talking about the apparent size of the Moon at the horizon Vs. high in the sky. NOT whether the Moon is actually bigger. I grant you that we are slightly further away from the Moon when it is rising or setting than when it is straight overhead. About 4000 miles further away. But that...
- Tue Jun 16, 2009 10:58 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: Moonrise Over Turkey (2009 June 16)
- Replies: 26
- Views: 8101
Re: Moonrise Over Turkey (2009 June 16)
The photo does not represent the question very well. The Moon IS bigger near the horizon, such as a Moonrise at the beach. This is due to the amount of atmosphere the light must go through to reach our eyes, NOT whether there are objects nearby. In this photo, the Moon is already high in the sky, ab...