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Pennine Pioneers of Science on Allfm.org

By Gurbir Dated: April 18, 2024 Leave a Comment

Between December 2023 and April 2024, I did a series of radio programmes for a local radio station – allfm.org. Called Pennine Pioneers of Science, the 8 programs profiled the lives and scientific achievements of 15 individuals associated with the north of England.

I will be continuing the live radio programs (every other Tuesday live at 1 pm on allfm.org) but with a focus on scientific research being undertaken today rather than in the past. This new series is available here.

Surprisingly on 24 March 2024, this series got to number one in the Global Science category on Mixcloud.com

Recordings of the radio programs, without the music tracks and adverts, are available to play or download below. On the grey horizontal bars below, click the arrow on the left to play or the three vertical dots on the right to download.



0: 14 December 2023 – Introduction to Pennine Pioneers of Science

The industrial revolution that spread across the globe started here in Manchester. It was science that made it possible.

In this short series of “Pennine Pioneers of Science” on Allfm.org I will profile the lives and achievements of people who have lived and worked where you and I live today. You may be familiar with names such as John Dalton (atomic theory), James Joule (energy), Ernest Rutherford (structure of the atom), Bernard Lovell (Jodrell Bank) and Alan Turing (first stored program computer). But the achievements of others such as physicist Gilbert Walker from Rochdale, J. J. Thompson from Cheetham Hill, astronomer William Crabtree from Salford and physicist James Chadwick from Bollington, are obscured by the mist of time.


1: 9 January 2024 Joseph Priestley (1733 – 1804) John Dalton (1766 – 1844)

Joseph Priestley, born near Leeds discovered Oxygen had a tough time as a dissenter and in the end, had to leave for America where he is buried in Pennsylvania.
John Dalton, originally from near Cockermouth but spent most of his life in Manchester conducted research into colour blindness, something from which he and his brother suffered. He is best known for advancing the case of atomic theory.

2: 23 January 2024 – William Crabtree (1610 to 1644) and Jeremiah Horrocks (1618 to 164)

On Sunday 24th October 1939, William Crabtree in Salford and Jeremiah Horrocks (born in Toxteth) in Preston observed the planet Venus pass in front of the Sun, also known as a transit. Horrocks had calculated this would happen only a few weeks earlier and told Crabtree. Occasional breaks in the clouds on the day allowed them to see it. They were the only two in the world who saw it. The measurements they took then helped us understand the planets’ sizes and the solar system’s scale. There was a transit of Venus in 2004 and 2012. Here is my recording of the 2004 transit of Venus.


3: 6 February 2024 – William Lassell (1799 – 1880) and James Joule (1818 – 1889)

William Lassell, a brewer by trade designed built and operated some of the largest telescopes in the world during his lifetime from Liverpool. He understood the importance of location and took his telescopes to Malta to observe. He collaborated with James Naysmith in Manchester.

James Joule was born in Salford and lived in Whalley Range, Salford, Stretford and Sale. Conduct research in heat, and energy and came up with the first law of thermodynamics – energy cannot be created or destroyed.


4: 20 February 20204 Edward Appleton (1892 – 1965) and JJ Thompson (1856 – 1940)
Edward Appleton from Bradford was for a time the world authority on the ionosphere. His work was timely coinciding with the arrival of radio. JJ Thompson from Cheetham Hill went beyond Dalton’s work and discovered that you can pick apart an atom and look at its constituent parts.


5: 5 March 2024 – Gilbert Walker (1891 – 1974) and James Chadwick (1868 – 1958)
Gilbert Walker was sent to India in 1904 to understand the Monsoon and provide weather forecasts. Analysing global weather phenomena is essential for our time but it was Walker who started it over 100 years ago. He also played a role in the story of the gifted mathematician – Srinivas Ramanujan who ended up in Trinity College in Cambridge between 194 and 1918.
James Chadwick from near Macclesfield discovered the Neutron, established the University of Liverpool as a centre for nuclear physics during the 1930s and helped ensure the UK had its own Nuclear Weapons after WW2.


6: 19 March 2024 – Ernest Rutherford (1871 – 1937) and John Cockroft (1897 – 1967)
Originally from New Zealand, he made his mark in history with an experiment that helped establish the nature and size of the Atom. Through experiments, he demonstrated what John Dalton had theorised 30 hundred years earlier. Member of the Royal Society, Rutherford established that most of the mass of an atom is locked away in a tiny nucleus and was awarded the Nobel Prize in 1908. He succeeded JJ Thompson as the professor of the Cavendish Laboratory in Cambridge. Typically, the atom is around a thousand times larger than the nucleus. Short audio recordings of his 1931 lecture at the university of Goettingen.


7: 2 April 2024- Fredrick Williams (1911 – 1977) and Alan Turing (1912 – 1954)
Manchester can claim many first. The execution of a stored program stored in memory on 24 June 1948 stands out. It was the development of digital random access memory by Freddy Williams (from Stockport) along with Tom Kilburn from Dewsbury and Geoff Tootill from Chaderton that made this achievement possible. Alan Turing came to Manchester later in 1948 because it was the only place where he could put into practice his thinking on the universality of computers. I learnt about his family links with India and Ireland. This episode includes an extract, not in his voice, from his 1951 BBC broadcast, Can Computers Think?


8: 16 Apr2024-Bernard Lovell (1913 – 2012) and Series Review
The fully steerable 75m Lovell Telescope (Jodrell Bank) has become an icon for the city of Manchester despite being located 30km away. The story of its construction in 1950’s Britain is fascinating by itself not to mention its role in the early days of the Space Race. But it is the story of Lovell himself, a scientist with a keen interest in building radio devices amid a World War that is particularly interesting.

In this episode, I only get to touch the surface of his many wartime contributions including in H2S based on the top secret device Cavity Magnetron and his many high-level contacts. I include clips from oral history recorded in 1987 by the Imperial War Museum.


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Episode 113 – Rocket Pioneer Hermann Oberth

By Gurbir Dated: April 5, 2024 Leave a Comment

Hermann Oberth around 1950s. Public Domain
Hermann Ober Around 1950s

The idea of using rockets for transport had been well-established before the first flights of heavier-than-air aeroplanes in 1903. When it comes to turning that idea into reality, three names are considered as fathers of rocketry: Konstantin Tsiolkovsky, Robert Goddard and Hermann Oberth.

For this episode, I visited the Hermann Oberth Space Travel Museum in the German Town of Feucht, near Nurnberg and spoke with its director Karl-Heinz Rohrwild. A summary of the interview is below along with some pictures from the museum.

The museum is run entirely by volunteers in the interest of science. The exhibits on display are a tiny amount of the exhibits that exist. Museum expansion planned the for 100th of the publication of his second book in 1929. With plans to make lots of the documents available online.I found Karl-Heinz very helpful, opening the museum for my visit during a public holiday. He and his colleagues extend that welcome to anyone wishing to visit. Contact details here.

Listen here or click the three dots to download

Hermann Oberth Spaceflight Museum

Summary

  • His father had been a surgeon. He wanted Hermann to have a career in Medicine.
  • Brilliant at maths but likely he was autistic at some level.
  • Lost his brother Adolf in WW1 and became anit-war.
  • Considered using a massive bomb delivered by rocket to destroy the senior people who decided to start and maintain the war.
  • Wrote two key books in rocketry in the 1920s
  • Fritz Lang director of the early sci-fi Metropolis followed by Frau im Mond. Oberth worked on that film as an advisor.
  • 1929: Winner of the International Award for Astronautics (Robert Esnault-Pelterie-Hirsch-Award)
  • Envisaged the use of solar energy in orbit and designed the first gyroscopes.
  • Also envisaged a huge space-based mirror that would beam power down to Earth for terrestrial use.
  • 1927 A member of the first and most successful space/rocketry society – Verien for Rsumshifffhart (Society of Space Travel)
  • Oberth championed the use of rocket staging, liquid engine propulsion and the use of rocket engines in the near vicinity of space (not in the atmosphere)
  • The RAF bombing raid on August 26, 1943, nearly killed both Oberth and Wernher von Oberth were working there.
  • Post WW2 interrogated by Theodore von Karman and it was decided Oberth was not taken to the USA. In part, Oberth did not want to go.
  • 1951 lived through tough times. He was making his living in part as a farmer.

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Episode 112 – Brown Dwarfs, Dark Matter and Dark Energy

By Gurbir Dated: March 15, 2024 Leave a Comment

This episode was recorded in Tenerife with Professor Eduardo L Martín who is based at the Instituto de Astrofísica de Canarias. He is working on the European Space Agency’s mission, Euclid.

In time Euclid will shed light on both dark matter and dark energy. It was launched in July 2023 and arrived in its L2 orbit a month later. It has just two instruments which will produce a high-resolution 3-D map of a third of the sky, stretching back 10 billion years during its initial 6-year operational lifetime.

Professor Martín is not part of the Euclid Consortium the around 2500 scientists and engineers from more than a dozen countries who operate the Euclid Mission. He is one of the two Euclid mission Independent Legacy Scientists. Professor Martín is a specialist in substellar bodies, that is celestial bodies with a size about that of Jupiter but with around 50 times its mass. When initially theorised in the 1960s they were called Black Dwarfs but renamed in the 1970s by Jill Tarter as Brown Dwarfs.

Brown Dwarfs generate energy only through gravitational compression, not nuclear fusion. There is an overlap in surface temperature between young brown dwarfs and old very low-mass stars. Martín and his collaborators have developed spectroscopic methods to distinguish brown dwarfs from stars, in particular the Lithium test. More about this interesting role of Lithium in cosmology in Professor Martín’s book published in 2023 by the Institute of Physics, entitled “Lithium Across the Universe“. You can download several free-to-read chapters – here.

Brown Dwarfs emit mostly in the infrared not optical light as our sun. One of the two instruments on Euclid operates in the infrared and can detect these “dark ultracold objects of substellar mass“. Does Professor Martin think Euclid will find Brown Dwarfs? He told me in this recording, “that is what I put in the proposal so we had better do now”. He is supported by a postdoc Marusa Zerjal and a student Diego Martin, funded by the European Research Council.

The first images were released in November 2023. The spacecraft and its instruments are operating well and sending data. More about the Euclid mission, images released so far and a summary of the attributes of Normal Matter, Dark Matter and Dark Energy below.

Episode112 ESA’s Euclid Mission with Professor Eduardo Martin

Perhaps the most pressing question for astrophysicists is what is the cosmos made of. They have known for a long time that visible matter accounts only for the 5%, Dark Matter, 27% and Dark Energy 68%. Currently, most of the attributes of Dark Matter and Dark Energy remain a mystery. Helping to shed some answers to these questions is Euclid’s primary goal.

The visible matter is something we are surrounded by. It responds to all 4 known forces, electromagnetic, gravitation, and the strong and weak nuclear force. Dark matter is not dark, it’s invisible and is only detected through its gravitational influence on the matter we can see. Gravitational lensing is one manifestation.

Whereas gravity is a force of attraction, Dark Energy is repulsive, powering the expansion of the Universe. Its effects are observed by monitoring type 1a supernovae in distant galaxies. Some scientists consider Dark Energy as the Cosmological Constant that Einstein initially added and then removed from his General Theory of Relativity. The Cosmological Constant is now considered by some as the 5th fundamental force, after gravity, electromagnetism, and strong and weak nuclear forces.

  • Horse head Nebula. Credit ESA
  • Globular Cluster NGC6397. Credit ESA
  • Irregular Galaxy NGC6822. Credit ESA
  • Spiral galaxy IC342. Credit ESA Credit ESA
  • Perseus Cluster. Credit ESA

Summary of attributes for Normal Matter, Dark Matter and Dark Energy

AttributeNormal MatterDark MatterDark Energy
Formation TimeShortly after the Big BangLikely formed shortly after the Big BangBelieved to have originated with the expansion of the universe
LocationEverything we can see including Galaxies, stars, planets and the interstellar mediumPrimarily in galactic halos, halos around galactic clusters and permeates the universeHomogeneously distributed throughout space, associated with vacuum energy
Observational EvidenceEmission and absorption spectra, visible light, X-rays, cosmic microwave backgroundGravitational effects on visible matter, galaxy rotation curves; Dark matter inferred from galaxy cluster dynamics by Fritz Zwicky, 1933). Galaxy rotation curves suggest dark matter and the work of Vera Rubin from the 1970s.
Observation of gravitational lensing.
Acceleration of cosmic expansion, distant Type 1a supernova observations by Saul Perlmutter, Brian Schmidt, Adam Riess (1998-1999).
In time, it may turn out to be the 5th fundamental force.
Interaction with Electromagnetic ForceStrong interaction, contributes to various spectra and emissionsWeak or non-existent interactions with light and other EM wavesWeak or non-existent interactions with light and other EM waves
Interaction with Gravitational ForceExperiences gravitational attraction with other matterExperiences gravitational attraction, influencing cosmic structures. Exhibits a repulsive gravitational effect, driving cosmic expansion
Percentage Composition in the Universe~4.6% of the total mass-energy content~26.5% of the total mass-energy content~68.9% of the total mass-energy content
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ISRO in the news

By Gurbir Dated: March 6, 2024 Leave a Comment

Three stories in the news related to the Indian Space Programme

1. The ISRO Chief ISRO chief S Somanath was diagnosed with more than 6 months ago. He saw him in Baku during IAC2023 – he looked well but was working to a hectic schedule – which is normal. The report below indicates that he is getting treatment and getting on with his job as normal. More here Times of India

2. A bit more detail but no schedule – for India’s lunar sample return mission. Two launch vehicles will be needed to complete the job. First the heavier LVM-3 with 3 parts – a propulsion module to get to the Moon, a Descent module to land and an Ascent module to come back to lunar orbit. The second will use the GSLV and contains two parts. A transfer module – transfers lunar samples in lunar orbit from the Ascent module and heads back to Earth and the second – a reentry module. This is part of the transfer module that will deliver the samples to the Earth’s surface.

No details of the landing point. It could be mainland India, the Indian Ocean or maybe the Australian outback. More on Reddit here

3. ISRO has published some details on the proposed design of the Next Generation Launch Vehicle. Three key innovations (a) use of methane with LOX – very popular at present (b) Reusable, at least in part using a barge at sea (c) The absence of a cryogenic stage, a technology that ISRO has spent lots of time and money on over the last 3 decades

The picture below from @ISROSpaceflight via Twitter/X

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