Starship Asterisk*

I get something like that on my glasses when they get scratched. Has the photographer checked the lens and filters? I was thinking along the same lines. When you get scratches on a lens or filter the scratches will run parallel to each other, if the damage occurs at one time. The effect would be mu...

Does anyone know why Jupiter has spikes and what causes the steam to be illuminated? :? Starlight filter? Could the apparent illumination be caused by a longer exposure? Thank you for your imput Andy. Perhaps I am just being too picky but I am getting a little tired of this digital age and all the ...

Does anyone know why Jupiter has spikes and what causes the steam to be illuminated?

To what extend could one make use of gravitational assist for increasing spacecraft speed if one lived in a large, tight globular cluster? Crossing from one side of the cluster to the other a spacecraft could make use of numerous stars for assist. This may well have happened quite naturally numerous...

Does anyone know whether the aurura in the photograph 'Aurora Over Alaska' is in focus or not? The foreground appears to be sharp. The distant trees appear to be less in focus. Is the aurora sharply focused, out of focus or was an artistic compromise make? An answer to my question: The stars are sh...

Does anyone know whether the aurura in the photograph 'Aurora Over Alaska' is in focus or not? The foreground appears to be sharp. The distant trees appear to be less in focus.

Is the aurora sharply focused, out of focus or was an artistic compromise make?

Perhaps this is an Aurora like phenomenon produced by the collision of charged particles contained in the Sun's Solar wind with Saturn's rings.

I agree with with your view Empeda2 but also with your question .
makc-i regularly visit the APOD site; it`s habit forming . You may be right . It just seemed to me that the post dealt more with a merger than a more routine impact crater?
Will visit again.

This APOD image looks to me like asteroid Itokawa was formed by the recent slow collision of two smaller asteroids. The "waisteline" was formed by matter settling to the surface. This would explain why there are no or few craters.