
Waiting in the mail yesterday was the April (!) issue of Sky & Telescope magazine. The cover features TMT in an article entitled "The New Monster Telescopes". Jonathan Lowe's article gives a great overview of the TMT, GMT and E-ELT projects.

Palomar Skies a blog with news and information about the Palomar Observatory. Postings here will cover current research, history and public outreach events taking place at the observatory.
A few days prior to his death he felt well enough to be wheeled outside. He looked up at the sky and said, "It is a beautiful day. The sun is shining and they are working on Palomar."While Hale missed seeing the completion of the mighty 200-inch telescope, his vision and determination made the telescope a reality. That's why it has carried his name since 1948.
Before anyone knew what a galaxy was it had been the convention call them "nebulae". Today the word "nebula" refers to a cloud of gas in space. At the time of his writing Zwicky knew that the "nebulae" he was referring to are all what we call galaxies. Edwin Hubble's discoveries about galaxies was less than a decade earlier and the term was a holdover from that previous age.
From September 5, 1936, until the end of May, 1937, about 300 photographs were obtained covering as often as possible the Virgo cluster of nebulae as well as its northern and southern extensions into Coma Berenices, Canes Venatici, Ursa Major, Hydra, and Centaurus, respectively. In addition, some of the nearby nebulae, such as the great nebula in Andromeda, Messier 33, 51, 80, 81, 101, NGC 55, 247, 253, 2403, 2366, 4236, IC 342, 1613, etc., were frequently photographed. It is estimated that, in the period mentioned, between 5000 and 10,000 nebular images were carefully searched for new stars.
February 14, 2008 marks the 110th anniversary of the birth of astrophysicist Fritz Zwicky. His amazing scientific career is relatively unknown to the general public, but he remains a giant in the astronomical community.
In an article titled “Idea Man” published in 2001 Stephen M. Maurer wrote that Zwicky will be “remembered as a gifted observational astronomer who had discovered more supernovae than everyone else in human history combined. Today, Zwicky’s reputation is bigger than ever, except that now astronomers think of him as a theorist. When researchers talk about neutron stars, dark matter, and gravitational lenses, they all start the same way: ‘Zwicky noticed this problem in the 1930s. Back then, nobody listened . . .’”
Starting in 1936 Zwicky used the 18-inch Schmidt to make the first rapid survey of the heavens, mapping out hundreds of thousands of galaxies. With it he also began his searches for exploding stars known as supernovae (With Walter Baade he even coined the term “supernova”), discovered that galaxies come in clusters and obtained the first evidence for dark matter. His searches for supernovae were extremely fruitful, having discovered more than 120 of them during his lifetime – at the time that was more supernovae than all other astronomers combined. He was the first to suggest, and correctly so, that a supernova marks an ordinary star’s transition to a collapsed, super dense object known as a neutron star.
Today’s astronomers are still following in Zwicky’s footsteps. Palomar’s 48-inch Schmidt (since renamed the Samuel Oschin Telescope) is used nightly to survey the sky, hunting for supernovae, gravitational lenses and more. Astronomers have found a renewed interest in Zwicky’s concept of sky surveys. Entire giant telescopes are about to be built for that purpose. Beyond his observational work Zwicky’s theoretical advances laid the foundation for modern astrophysics, which owes him a great debt.
In this era of large and giant telescopes the old "Big Eye" on Palomar continues to be used nightly. Astronomers continue to build new and innovative instruments for the Hale, keeping it in the forefront of modern astronomy. New instruments that have just arrived and will soon be coming will bring advances in adaptive optics, new exoplanet discoveries, and allow the Hale to detect and map emission from the intergalactic medium."