- #1
Hoku
- 160
- 0
I've been putting this off for a while, but I saw something kinda neat last month (mid-late September actually) and I'm curious to see how common it is and to understand it a little better.
My husband, daughter and I were staying at a cabin in the mountains and got back to it one night when the moon was getting higher in the sky (maybe 10pm?). The moon was nearly full. When we got out of the rental Jeep, we looked up at the moon and saw a noteworthy satellite.
From our perspective, it was pretty close to the moon and moving towards it. The thing that was really neat about it was that, whatever signals it was sending - GPS, cellphone, whatever - were visible. I think they were reflecting the moons light. So we saw concentric rings, maybe 6, covering about 90 deg of its circle, in the direction of travel (towards the moon). When it passed the moon, it was much more difficult to see but the "behind waves" were definitely not reflecting the light. Maybe because they weren't being compressed as much?
One of the things that I didn't understand about it was that the waves seemed to move at the same speed as the satellite. How do they get anywhere if they're moving at the same rate? I fear how ignorant that question makes me look. Maybe it has to do again with the compression of waves due to the satellite moving through it. I guess that would makes sense.
At any rate, the final piece to this, which is probably entirely coincidental, was that there was a second satellite in front of the unusual one - directly centerend and ahead of of the reflected waves. This satellite was much more faint and didn't seem to be reflecting the moons light, but it sure seemed to be leading the brighter satellite. Their speed and direction was perfectly matched.
Insights??
My husband, daughter and I were staying at a cabin in the mountains and got back to it one night when the moon was getting higher in the sky (maybe 10pm?). The moon was nearly full. When we got out of the rental Jeep, we looked up at the moon and saw a noteworthy satellite.
From our perspective, it was pretty close to the moon and moving towards it. The thing that was really neat about it was that, whatever signals it was sending - GPS, cellphone, whatever - were visible. I think they were reflecting the moons light. So we saw concentric rings, maybe 6, covering about 90 deg of its circle, in the direction of travel (towards the moon). When it passed the moon, it was much more difficult to see but the "behind waves" were definitely not reflecting the light. Maybe because they weren't being compressed as much?
One of the things that I didn't understand about it was that the waves seemed to move at the same speed as the satellite. How do they get anywhere if they're moving at the same rate? I fear how ignorant that question makes me look. Maybe it has to do again with the compression of waves due to the satellite moving through it. I guess that would makes sense.
At any rate, the final piece to this, which is probably entirely coincidental, was that there was a second satellite in front of the unusual one - directly centerend and ahead of of the reflected waves. This satellite was much more faint and didn't seem to be reflecting the moons light, but it sure seemed to be leading the brighter satellite. Their speed and direction was perfectly matched.
Insights??