Apr 3, 2025 | Focal Plane
In the 19th century, Alvan Graham Clark was one of the premier lens makers for telescopes. His craftsmanship was sought after and many observatories in the late 19th and early 20th centuries were built to house his refractor telescopes. In fact, smaller Alvan Clark...
Apr 3, 2025 | Focal Plane
We are confused about how old the Universe is. Until recently, astronomers estimated that the Big Bang occurred between 12 and 14 billion years ago. Astronomers can place a lower limit to the age of the universe by studying globular clusters. Globular clusters are a...
Apr 1, 2025 | Rick's Picks
Transient Events That Can Give Us a Good Enough Reason to Get Outside and Do a Little Observing All month: the solar system balances morning and evening targets this month as Mercury, Venus, Saturn, and Neptune move into the predawn sky, while Mars, Jupiter, and...
