If you are trying to photograph deep sky objects through a mid sized telescope, I don't think you will find a mount in your budget range, unless you can get one used off of ebay or some such. The tabletop equatorial mount might be appropriate if you're just doing the sky. However, for a telescope, just the motors for a good equatorial drive will set you back $100 or more....
If you are only trying to photograph planets or the moon, you won't need any tracking ability to get spectacular photographs.
Though very light in atomic weight, lithium is less common in the solar system than 25 of the first 32 chemical elements.
The lack of lithium in the universe is one of the great unsolved mysteries in astronomy.
The collision involved an Iridium commercial satellite, which was launched in 1997, and a Russian satellite launched in 1993 and believed to be nonfunctioning. Each satellite weighed well over 1,000 pounds.
This is the fifth spacecraft/satellite collision to occur in space, but the other four were all fairly minor by comparison.