Starship Asterisk*

Since the vertex is not a physical object, but rather is a point in space without substance, it is not bound by the laws of physics not to exceed the speed of light. Imagine two wavefronts moving toward each other at the speed of light. As long as they are meeting at some angle, the point of their m...

I thought of it as the tadpole galaxy

Concerning Astronut's reply. I think it looks kinda like an ant; and your timing problem is most likely caused by having Charter as you cable provider. Charter appears to have several systems designed just to put glitches into your internet service, usually at the most inopportune time. Guess which ...

I heard that they found LGM's (little green microbes) in the water

If you lived on a planet towards the center of this cluster, what would the night sky be like. Would it be uniformly bright or would the entire sky have the hazy appearance of our own milky way. With so many stars so close together, there would be hundreds of stars as bright as our brightest. Star g...

Which planet boasts the highest wind velocity in our solar system?

Regarding Chris's answer to the question (about which I, also, had wondered). I thought that the atmosphere was pretty much transparent to X-rays and that the X-rays being electro-magnetic waves were not affected by magnetic fields. It would seem that the atmosphere and earth's mag field wouldn't of...

I enjoyed the graph by Redbone. I wondered what the jagged peaks were during each year. Sunsets per month? I wish there were some axis labels to help. (Perhaps I should recognize this graph and am just showing my ignorance. Sorry) Excellent APOD.
Dave

When I saw the grooves moving through the bottom of the craters, I immediately thought of sedimentary rock layers as Jeremy said. My problem with this is that the grooves should have been filled in when the craters formed and not just continue through as if they were put in after the crater. It is c...

What an excellent shot. Many thanks for submiting it and thanks to your wife for insisting. I'm just blown away.

Caption Contest - Today NASA announced progress on the Death Ray. Skywalker and Company claim announcement is fraudulent.

In going through the APOD's, You made a comment about the interstellar dust being "burned away" by the bright stars. This surely doesn't mean burned as in combined with oxygen. Exactly how is the dust eliminated?

So you have a solid composed of lithium bosons and fermion. Does this mean that as you cool this solid, it will contract more than a solid composed of just fermions. If the bosons will "shrink" together, they should take up less physical space. I wonder if this has been tested and what the...

The underground liquid theory seems unlikely given the atmospheric pressure and the prevailing temperatures on Mars, yet the points made do seem to match the picture pretty well. This is one where I'd have to say "show me the proof" before fully accepting the explaination. Good interpretat...

Thanks Chris. A fellow teacher at the school knew I followed the APOD and asked about solstices and I wasn't sure of the answer. I passed your comments on to him and he sends his thanks also
Dave

I believe that the Spring equinox (vernal equinox) occurs when the sun crosses the earths equitorial plane and is in a certain constellation (which I can't remember). The fall equinox is when it crosses back and also has it's own constellation. The summer solstice in the northern hemisphere occurs w...