Search found 2 matches
- Tue Feb 23, 2021 7:16 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Video: Perseverance Landing on Mars (2021 Feb 23)
- Replies: 16
- Views: 4511
Re: APOD: Video: Perseverance Landing on Mars (2021 Feb 23)
Unrelated: Isn't there a bit of what might be called 'friction" in space, that is, moving bodies encountering dust and even larger things that are not moving as fast or in the same direction as the body in question? And if that is true, wouldn't the speed with which any body orbits anything be ...
- Fri Feb 19, 2021 3:12 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Swiss Alps, Martian Sky (2021 Feb 18)
- Replies: 10
- Views: 3669
Re: APOD: Swiss Alps, Martian Sky (2021 Feb 18)
The caption said that the sun is about 2/3 the size from mars as it is from earth. But I was under the impression that the apparent size of an object dropped off as the square of the distance away. So doing the math, with mars 141 million miles and earth at 93 million miles: (93 x 93)/(141 x 141), I...