August
1976. The 21st Olympics closed in Montreal, Canada; race riots in Cape Town,
South Africa left 17 dead; and Elizabeth Taylor divorced Richard Burton ... for
the second time. Those items I admit to having referenced, being unable to recall
them. I do, however, remember hearing Candi Staton’s soul classic Young Hearts Run Free on the radio, and watching
West Indian greats Michael Holding and Viv Richards destroy England at London’s
Oval Cricket Ground during that hot, and impossibly dry, summer month. Such was
the mind of a ten-year-old boy who was passionate about cricket and music but
little else.
During
that same month, I visited one of Britain’s most spectacular examples of post-war
scientific development. The Jodrell Bank Observatory, in my home county of
Cheshire, houses (what was then) the largest steerable radio telescope in the
world (Figure 46.1). Constructed in the 1950s, and weighing 3,2oo tons, it was
the brainchild of an innovative English physicist called Bernard Lovell.
Figure
46.1: The jewel of the Cheshire countryside
Copyright
© 2012 Ian Morison, Jodrell Bank Observatory
Lovell,
born in 1913, obtained his science degrees at the University of Bristol in the
1930s. Prior to World War Two, he worked as part of a research team at the
University of Manchester. When hostilities began, he developed aircraft radar
systems, and was awarded an OBE as soon as the war had been won. From 1945
until 1980, he was the first Observatory Director (Figure 46.2), during which
time the ‘Lovell telescope’ acted as an early warning system during the Cold
War. His knighthood, in 1961, was thoroughly deserved.
Figure
46.2: Sir Bernard Lovell, working at his desk at Jodrell Bank
Copyright
© 2012 NASA
Today,
I returned to Jodrell Bank, after 36 years, with one of my sons. This year, the
summer weather is a far cry from the sun and haze of ’76. Britain is,
apparently, enduring its wettest summer on record; but the heavy, grey sky could
do nothing to diminish our sense of anticipation as we cruised along the winding
country lanes between the green villages of Goostrey and Chelford.
For
sound reasons, the observatory is situated deep in the countryside, where signal
interference is minimal. The original visitor centre and planetarium are no
longer there, but the vast parabola (Figure 46.3) looked as awesome as ever,
especially through the eyes of a child (Figure 46.4). Recent redevelopments
include a Space Pavilion, complete with interactive activities, and a
beautifully-crafted orrery (clockwork Solar System model) (Figure 46.5) which
captivated everyone who stopped to look at it. It was possible, also, to obtain
real-time data from space (Figure 46.6).
Figure
46.3: The parabola, one of the most useful (and elegant) geometric shapes, is a
common feature of scientific and engineering practice (see ‘Galileo In The Kop’).
The 76-metre-diameter dish reflects all incoming radio waves to the same focal
point, where the receiver is situated. These are then relayed to an amplifier,
which magnifies the faint signals, before being processed by computer.
Copyright
© 2012 Massachusetts Institute of Technology
Figure
46.4: One of my sons, gazing up in admiration at Lovell’s creation. It could
easily have been a picture of myself from 36 years ago.
Copyright
© 2012 Paul Spradbery
Figure
46.5: An orrery is an intricate mechanical device showing the relative
positions and motions of the planets.
Copyright
© 2012 Smabs Sputzer
Figure
46.6: Live radio telescopic data from 2012. I remember that back in 1976 this
information was produced in the form of ticker tape!
Copyright
© 2012 Jodrell Bank Observatory
Half
a century after its construction, the Lovell remains a fully functional radio telescope,
operating as part of the MERLIN and European VLBI Networks. Current research
includes investigations into cosmology, galaxies, astrophysics and, in
particular, pulsars (highly-magnetized, rotating, radioactive stars), the
discovery of two-thirds of which have been made at Jodrell Bank.
Most
famously, perhaps, the Lovell telescope tracked the Apollo 11 spacecraft to and from the moon in 1969 – a poignant fact
in the week when its commander, Neil Armstrong, died.
By
some sad coincidence, August 2012 will be noted for the death of an equally illustrious
man. Three weeks ago, Sir Bernard Lovell died peacefully at his Cheshire home.
He was 98 years old. His legacy is obvious. No Lovell ›› no
Jodrell Bank ›› no Professor Brian Cox enthralling us on TV ›› far less inspiration
to today’s school children – including my own.
Lastly, I feel obliged to mention that Sir
Bernard’s childhood hobbies, from both of which he continued to derive great
pleasure throughout his long and distinguished adult life as a scientist
(Figure 46.7), were cricket and music. What
more is there to say?
Figure
46.7: A short biography of Sir Bernard stands
between the Lovell telescope and new Space Pavilion
Copyright
© 2012 Paul Spradbery
Copyright
© 2012 Paul Spradbery
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