Price history: This is the cheapest the Celestron Nexstar 6SE has been since March, when it was $919. Since then, it has been ...
I'm often asked to recommend a telescope, especially around the holidays, when gift-giving is on our minds. Today I'll share a few suggestions, but before we talk specifics, let's look at the ...
3C 273 is the most distant object easily visible with a modest telescope. To see it, use a telescope (at least 6-inch), observe from a dark location, and choose a moonless night. 3C 273 is best viewed ...
Scientific American is part of Springer Nature, which owns or has commercial relations with thousands of scientific publications (many of them can be found at www ...