Author Archives: Richard Tresch Fienberg

Richard Tresch Fienberg

About Richard Tresch Fienberg

Rick Fienberg is Press Officer of the American Astronomical Society and former Editor in Chief of Sky & Telescope. He does visual observing, astrophotography, and scientific CCD imaging from his backyard observatory in central New Hampshire.

How can a telescope have an f/ratio of f/42?

I was amazed at Jim Melka’s beautiful picture of Mars on page 136 of the January 2006 issue but puzzled by the caption, which said that he used a 12-inch reflector at f/42. How is this possible? Knowing that a telescope’s f/ratio is its focal length divided by its aperture, you’re probably imagining poor Jim…


When will the last total solar eclipse occur?

With the Moon slowly receding from Earth, there will come a time when it no longer has sufficient angular size to cover the Sun completely. When will the last total solar eclipse occur? When the Moon’s at its closest and biggest and it can no longer cover the Sun at its farthest and smallest, total…

How can I see more colors through my telescope?

Nebulae and galaxies invariably look like shapeless, colorless blobs in my 6-inch telescope, a far cry from their spectacular appearance in photographs. If I buy a 12- or 14-inch scope, will I see a dramatic improvement? Would that it were so! A larger telescope will better reveal the shapes of nebulae and galaxies, and it…

Could you see astronauts on the Moon?

If there were astronauts on the Moon, could we see them? I get some variant of this question almost every time I show someone his or her first view of the Moon through a telescope, especially at high magnification. The breathtaking sight of lunar craters, mountains, and other features down to the limit of perception…

Hubble Takes a Hit

The rumors that circulated in late January were true: The Bush Administration's proposed budget for fiscal year 2006 includes no money to service the Hubble Space Telescope.