The time thing is interesting, but I feel like no one talks much about the appearance of passing objects. That is, I wonder how the image of a passing celestial object might distort due to length contraction and any other effects. I’m still trying to understand that. This article seems pretty digestible, so far.
I love this line, "...is an asteroid-sized moon orbiting a few thousand miles (or kilometers) above the Martian surface..." A few thousand miles...or kilometers, we don't care, pick your favorite.
Starlink is causing problems, but it seems to me that this image was made in bad faith to oversell the case. The caption says it’s a combination of 29 separate exposures, but if those exposures were combined properly, you wouldn’t see the satellites (median combination does wonders, and there are more sophisticated techniques which do even better). Some streaks start at one chip edge and extend to another chip edge, without continuity across the focal plane. So it’s not at all clear just how this image was created. And why on earth is it not flat-fielded? Maybe this is just really sloppy image processing, but even amateurs can do far better than this, leaving the final combination with no satellites at all.
Our navy terrorizes most of the world. The US Army just figured out Class A uniforms. There is no reason why the Bundeswehr should outshine us in uniform design. It’s a tailoring gap we must overcome before we can conquer ze world. So you have nothing to worry about, except coming up with better comments.
It’s not a secret, just hard for amateurs to do. No doubt states with space monitoring equipment always knew. He just did it with a camera in his backyard and his laptop.
Also, he’s Finnish.
Amateur observations of the spaceplane indicate it is flying in a highly elliptical orbit ranging between 201 and 24,133 miles in altitude (323 and 38,838 kilometers). The orbit is inclined 59.1 degrees to the equator.
This is not far off the predictions from the hobbyist tracking community before the launch in December. At that time, enthusiasts used information about the Falcon Heavy’s launch trajectory and drop zones for the rocket’s core booster and upper stage to estimate the orbit it would reach with the X-37B spaceplane.
Mimas’s ocean appears to be relatively young, forming in the past 25m years when powerful tidal forces exerted by Saturn deformed Mimas’s core, warming it like a massaged squash ball. The heated core then melted overlying ice, creating an ocean inside the Saturnian moon.
we think of glacier water as pure, the water on Mimas is brand new and never been touched
astronomy
Gorące
Magazyn ze zdalnego serwera może być niekompletny. Zobacz więcej na oryginalnej instancji.