Showing posts with label astronomy. Show all posts
Showing posts with label astronomy. Show all posts

Friday, 20 November 2020

RIP Arecibo

I was greatly saddened to read today that the Arecibo radio telescope is going to be dismantled. The telescope has been suffering from maintenance problems for a while, and is now apparently past safe repair.

Sixty years ago, my father was seconded from the CSIRO to Cornell University for three years, and worked on the construction of the telescope — until recently the world's largest. He talked about those three years, split between upstate New York and Puerto Rico, for the rest of his life.

Although the original research case (and other motivations) for constructing the telescope were spotty, once built it was a unique instrument, and it was used in a series of key observations in astronomy and planetary science. Built into a valley, it was a spectacular sight — hence its appearance in movies, sometimes as itself, sometimes not. I have never had the pleasure of visiting Puerto Rico, so I've never had the chance of seeing the telescope in person. Now it seems I never will.

Farewell, friend.

(Image from the NYT article.)

Sunday, 10 May 2009

Genes, hobbits, plutonium, telescopes, a moon, and an obituary

A view of the planet Neptune, and its giant moon Triton, from a distance of 3.75 billion kilometres, taken by the New Horizons spacecraft, en route to the dwarf planet Pluto and the Kuiper Belt. Image details can be found on this page at the NH website.

This image is featured in honour of Venetia Burney Phair, a retired economics and maths teacher, who died recently at the age of 90; and who, as a girl of 11, gave Pluto its name. One of the instruments on New Horizons --- designed, built, and operated by students --- was earlier named in Mrs Phair's honour.

In other space science news, the shuttle Atlantis is due to launch on Monday for the final mission to repair and service the Hubble Telescope. Because of the extra danger in missions to the Hubble, the shuttle Endeavour will be on standby as a rescue vessel, in case anything goes wrong. Some years ago, when NASA tried to rule out such missions because of the danger to the crew, it wasn't just the scientific community that objected: some of the astronauts did too ...

Other articles:

On the genetic analysis of common diseases

On “hobbits”: the black swans of palaeontology ... and their flat feet

On why the Americans are going to make more plutonium 238 (hint: not for bombs), how they will use it more efficiently when they have it, and why Stirling engines are the bees' knees