Astronomy Cafe – Nov 29, 2021

Posted by as Astro Cafe

Meeting transcript video

  • Astro Cafe hosting – Randy Enkin
    • John has resigned as a meeting host, so we need a new second host
    • Job description
      • Send meeting link to members on the Skynews list
      • Create a short slide show for Astrophotos from Edmonton
      • Keep a list of speakers and presenters for the evening
      • Host the online meeting
    • Contact Randy Enkin or Chris Purse for any questions about hosting or to volunteer
    • No Astro Cafe will be held on Dec 27th or Jan 3rd
  • 2022 RASC Calendars – Chris Purse and Lauri Roche
    • Delivery from National office is pending
    • Local delivery will be done by our volunteers
  • Dr. Laurie Rousseau-Nepton – profile by Marjie Welchframe
    • Canadian Women Astronomers series (have 9 more to present)
    • Indigenous woman from Quebec
    • Laval U – PhD
    • CFHT resident astronomer – 2017-present
    • SITELLE instrument – Fourier transform spectroscopy
    • SIGNALS – principal investigator – star formation survey
    • First Nations culture helps with conducting quality scientific research
    • NFB – she is finishing the film “The Northern Star” for high school students
  • Edmonton Astrophoto – Dave Robinson
    • Lunar Eclipse composite – Jan 21, 2019 & Nov 19, 2021 – Alister Ling
  • Astronomy & Space Book Reviews/Recommendations by members
    • Randy Enkin
      • The Apollo Murders by Chris Hadfield
      • Description of Apollo lunar missions – Chris Gainor
    • Martin Gisborne
      • Lunar Module at Grumman Factory photos
      • The Victorian Amateur Astronomer – 1820-1920 – by Alan Chapman – fascinating star parties and people, how photography changed astronomy
    • John McDonald
      • Lonely Hearts of the Cosmos by Dennis Overby
      • Empire of the Stars by Arthur J Miller
      • Miss Leavitt’s Stars by George Johnson
      • Decoding the Heavens by Jo Marchant
      • The Glass Universe – by Dava Sobel – transition to spectroscopy and variable stars
    • Derek Trimmer
      • Violent Universe ‘An eye-witness account of the commotion in Astronomy 1968-69’ by Nigel Calder, published by the BBC, 1969 – a mid-teenager favourite
    • David Lee
      • A History of the Universe in 100 Stars – Florian Freistetter (current)
      • The Hundred Greatest Stars Hardcover – Illustrated, June 19 2002 by James B. Kaler
    • Oliver Robinow 
      • The Perfect Machine – Ronald Florence, 1995 – building the Palomar telescope
    • Lauri Roche
    • Chris Gainor
      • When the Earth Had Two Moons – Erik Asphaug
      • Across the Airless Wilds – Earl Swift – about the lunar rover for the last 3 Apollo missions
      • Liftoff – Eric Berger – history of SpaceX
    • Garry Sedun
      • The Stars: A New Way to See Them – H. A. Rey (of Curious George fame)
      • The Last Stargazers – Emily Levesque
    • Neil Banera
      • A Manual For Amateur Telescope Makers – Jean-Marc Lecleire & Karine Lecleire (Willman Bell) – good descriptions of how to make corrections to mirror figures, tools to use, 3 telescope configurations
      • Meteorite Hunter: The Search for Siberian Meteorite Craters by Roy A. Gallant
  • Telescope Building with John Dobson – figuring mirrors on Youtube – Martin Gisborne
  • Astronomy Cafe – Chris Purse
    • Need another host for Astro Cafe – talk to Chris Purse
    • Need another person to video record the meeting (and take notes) for posting on Victoria Centre’s website and Youtube – talk to Joe Carr
    • We will need several hosts when we return to in-person, hybrid Astro Cafes in Fairfield
  • Chris Gainor
    • Hubble Update – only one instrument is still non-functional
    • JWST virtual launch event signup

Astronomy Cafe – Nov 22, 2021

Posted by as Astro Cafe

Video transcript of the meeting

  • Astrophotography SIG – intro by John McDonald
    • Special Interest Group meets on the 4th Wednesday of each month
    • Challenge project – processing the recent Plaskett data
    • Martin Gisborne – a short journey to astrophotography
      • Professional photographer – worldwide
      • Telescope shop tempted Martin while he lived in Paris
      • Lived close to the Ames Research Centre and Orion Telescopes in the Bay Area of California – more temptations and motivation
      • Review of his astronomy equipment acquisitions, processing software and apps
      • Refined his methodology over the last few years since moving to Canada
      • Reviewed early astrophotos and how they are progressing
      • The Deep-Sky Imaging Primer – Charles Bracken series of books
      • His Heart and Soul Nebula photo featured on the RASC Journal 
      • Pandemic supply chain issues a challenge to new amateur astronomers to acquire equipment
      • Photo show: Pleiades (M45), Triangulum Galaxy (M33), Heart Nebula (IC 1805), Hercules Cluster (M13), Saturn, Mars, Jupiter, Comet Atlas C/2019 Y4, Comet NEOWISE, California Nebula, Bubble Nebula, Flaming Star Nebula widefield, Iris Nebula, Moon with Mars nearby, M81 Bode’s Galaxy & M82 Cigar Galaxy 6-hour exposure.
      • He is fascinated by the history of photography being used for astronomy
      • Instagram page
      • Photo gallery
    • Joe Carr – Southern Sky Celestial Objects
      • Observing and photographing celestial objects from the southern hemisphere
      • How far south to go: Costa Rica, Atacama Desert in Chile, Namibia or Botswana in southern Africa, Australia, New Zealand
      • Photo show: Small and Large Magellanic Cloud galaxies, 47 Tucanae and Omega Centauri globular clusters, Tarantula Nebula, Jewel Box open cluster, Crux and Carina constellations, Eta Carinae Nebula
      • Southern Sky time lapse video from Atacama Lodge, San Pedro de Atacama by Jerry Black
      • Advice on observing and photographing from the souther hemisphere – some challenges for “northerners”.
    • Alec Lee
    • Brock Johnston
    • John McDonald
      • Reprocessing previous astrophotos
      • Milky Way from Cave Creek in the mountains of southern Arizona
      • Witch Head Nebula
      • Closeup of the Moon – Gassendi Crater from the Victoria Centre
      • Uranus and Neptune
      • Photo gallery
  • Lauri Roche
    • RASC 2022 Calendars – signup for a copy – contact Lauri
    • RASC workbooks and almanacs also available
    • Native skywatcher planispheres
    • FDAO Star Party last Saturday – thanks to our members who helped
    • James Web Star Party 2 on Dec 18th – Dr. Madeline Marshall, Dr. Wes Fraser
  • Alberta Astrophotos – Dave Robinson
    • Lunar Eclipse series – Alistair Ling
  • Chris Gainor
    • James Web Space Telescope – launch delayed until Dec 22nd
    • Restoring Hubble Space Telescope to full operation – another instrument is working
  • Lunar Sketch – Randy Enkin
    • Presenting to Nanaimo Astronomy Group this Thursday
    • A new sketch of Petavius and other nearby craters on the terminator of a Waning Gibbous phase

President’s Message – Nov 2021

Posted by as President's Message

Everybody should have a good astro-project on the go. My current one concerns the timing of lunar eclipses.

Solar eclipse geography and timing is known with remarkable precision. So much so that people, including many members of our RASC community, are willing to plan long, difficult, and expensive trips to watch them. The timing and location of the earth’s shadow, or umbra, across the Moon during a lunar eclipse is much more variable and poorly understood.

I was delighted to learn that as far back as 1687, Philippe de la Hire published that the Earth’s shadow was larger than could be accounted for by an airless Earth, leading to lunar eclipses that start a few minutes earlier and end a few minutes later than expected. This was important work, because observing the timing of eclipses was, in principle, one way to measure longitude – as long as the expected timing was well established.

Moon on Dallas Road, Oct 8, 2021, by Randy Enkin

The problem arises from the complex nature of the earth’s atmosphere that obscures, diffracts and refracts the sun’s light on its way to the Moon. I first became aware of the role of amateur lunar crater eclipse timing just before the eclipse last May (which was clouded out), and I am certainly keen to try again on the upcoming lunar eclipse, starting around 23:19 PST on Thursday, November 18. If there are clear skies, I’ll be out with my telescope, noting the time to the tenth of a minute that the earth’s umbra darkens (“immersion”) and then departs (“emersion”) from various lunar craters. Sky and Telescope has been compiling these observations since 1956. Herald and Sinnott (2014) have analysed the compilation, extended back to 1842, with an amazing 22 539 observations. Their main conclusion is that the Earth is surrounded by a “notional eclipse-forming layer” that is 87km thick. It is a really surprising result, since even noctilucent clouds don’t show up that high in the atmosphere.

Herald and Sinnott point out that amateur uninstrumented observations provide continuity with the early observations in their compilation and provide insight into the visual response of the human eye. To help with the observations, Thursday- Friday November 18-19, I have annotated a picture of the full moon with the crater timings predicted by Fred Espenak. I hope some of you will join me making these simple but useful observations.

Look Up,
Randy Enkin, President@Victoria.RASC.ca

Astronomy Cafe – Nov 15, 2021

Posted by as Astro Cafe

Video transcript of meeting

The Last Stargazers – Dr. Emily M Levesque – intro by David Lee

A bird that mimicked a black hole. The astronomer that discovered microwave ovens. A telescope that got shot. The science of astronomy is filled with true stories (and tall tales) of the adventures and misadventures that accompany our exploration of the universe. Join Dr. Emily Levesque, author of the new popular science book The Last Stargazers, to take a behind-the-scenes tour of life as a professional astronomer. We’ll learn about some of the most powerful telescopes in the world, meet the people who run them, and explore the crucial role of human curiosity in the past, present, and future of scientific discovery.

Dr. Emily Levesque is an astronomy professor at the University of Washington. Her work explores how the most massive stars in the universe evolve and die. She has observed for upwards of fifty nights on many of the planet’s largest telescopes and flown over the Antarctic stratosphere in an experimental aircraft for her research. Her academic accolades include the 2014 Annie Jump Cannon Award, a 2017 Alfred P. Sloan Fellowship, a 2019 Cottrell Scholar Award, and the 2020 Newton Lacy Pierce Prize. She earned a bachelor’s degree in physics from MIT and a PhD in astronomy from the University of Hawaii.

  • The Last Stargazers – recently published popular book
    • Subaru Telescope fault – first story in the book
    • Role models for professional astronomers
    • Interviewed her fellow astronomers for their stories, including Dr. Elizabeth Griffin from the DAO
    • McDonald Observatory – 107 inch telescope mirror that was shot at
    • Parkes Observatory – Mysterious radio bursts – paper authored by Petroff et al. 2015
    • Green Bank Observatory – radio noise from squirrel trackers
    • Laser Interferometer Gravitation-Wave Observatory (LIGO) – gravitational wave detection and thirsty ravens
    • SOFIA airborne telescope
    • High altitude balloons and rockets
    • Solar Eclipse observation from Svalgaard, Norway
    • South Pole Telescope
    • George Carruthers – inventor of the IR camera taken to the Moon on Apollo 16 mission
    • Manastash RIdge Observatory – UW grad student Doug Geisler’s observing log for May 18, 1980
    • Change of technology for data capture from photographic plates to CCD digital cameras
    • Vera C. Rubin Observatory – time series survey observations
    • Q&A
  • Edmonton astrophotos – Dave Robinson
    • LBN 438 Nebula in Lacerta – Abdur Anwar
    • Nova Cass – Abdur Anwar
    • IC 410 in Auriga – Tom Owen
  • Lauri Roche
  • Lunar Eclipse – Nov 18-19
  • Global Star Party – starting at 4:00PM Nov 16th – Nathan Hellner-Mestelman and Lauri Roche will appear at about 4:30PM, DAO virtual tour (more interactive link & see the chat feed)
  • Dr. Robert Thirsk – Dec 13th – live online Astro Cafe event, but no recording will be made or posted

Astronomy Cafe – Nov 8, 2021

Posted by as Astro Cafe

Video transcript of meeting

  • Dr. Robert Thirsk speaker for Dec 13th – arranged by Jeff Pivnick
    • 20 minute Q&A after online presentation
  • Two Clusters from earlier this year – Dave Payne
    • Double Cluster – 3-6 million years old, so stars are blue
    • Caroline’s Rose in Cassiopeia – 1.6 billion years old, so stars are more red
    • Owl, Flying Bat, Squid Nebulae and Peiades are coming up
  • Women Astronomers – Marjie Welchframe
  • Edmonton Astrophotos – Dave Robinson
    • Aurora – Abdur Anwar (from Blackfoot site) & Arnold Rivera (all-sky camera) & Ian Doktor (south Edmonton)
    • M1 Crab Nebula – Kent
    • Conjunction of Moon & Mercury on Nov 3rd – Jeff Robertson
  • Lauri Roche
    • Astro Compass from Elizabeth Griffin – Need someone who is interested to have a look at it, and decide what to do with it
    • Two FDAO Star Parties (start at 7PM): James Web Telescope events on Nov 20th (Matt Taylor and Chris Willet), Dec 18th (two more presenters)
  • Neural Networks – John McDonald
    • Starnet – neural network processing to remove stars – an aid in processing astrophotos
    • Neural network processing could stop future epidemics by identifying individuals that should be tested. Transmission could be reduced to near zero using this methodology.
    • Discussion about how neural networks learn.
  • Chris Gainor
    • Hubble Problem Update
      • Team has one of the instruments working
      • Signal synchronization issue
      • Bringing the other instruments online one by one
    • James Webb Space Telescope – Chris Gainor
      • Shroud on top of telescope has been cleared for launch
      • Dec 18th launch (4:30AM launch for us in Pacific Time Zone)
    • Decadal Survey on Astronomy and Astrophysics 2020 – National Academy of Sciences – new priorities for astronomy, including a new, large 6m space telescope for the 2040s.
  • Next week’s Astro Cafe speaker: Emily Levesque – arranged by David Lee

Title: The Last Stargazers – a book by Dr. Emily Levesque

Emily Levesque
Emily Levesque

Description: A bird that mimicked a black hole. The astronomer that discovered microwave ovens. A telescope that got shot. The science of astronomy is filled with true stories (and tall tales) of the adventures and misadventures that accompany our exploration of the universe. Join Dr. Emily Levesque, author of the new popular science book The Last Stargazers, to take a behind-the-scenes tour of life as a professional astronomer. We’ll learn about some of the most powerful telescopes in the world, meet the people who run them, and explore the crucial role of human curiosity in the past, present, and future of scientific discovery.

Bio: Emily Levesque is an astronomy professor at the University of Washington. Her work explores how the most massive stars in the universe evolve and die. She has observed for upwards of fifty nights on many of the planet’s largest telescopes and flown over the Antarctic stratosphere in an experimental aircraft for her research. Her academic accolades include the 2014 Annie Jump Cannon Award, a 2017 Alfred P. Sloan fellowship, a 2019 Cottrell Scholar award, and the 2020 Newton Lacy Pierce Prize. She earned a bachelor’s degree in physics from MIT and a PhD in astronomy from the University of Hawaii.

Astronomy Cafe – Nov 1, 2021

Posted by as Astro Cafe

Video transcript of meeting

  • Edmonton astrophotos – Dave Robinson
    • Comet 67P and Crab Nebula – Alister Ling
    • Pacman Nebula NGC 281 – Dennis Boucher
  • David Lee
    • Beginners’ SIG tomorrow night
    • EAA SIG Thursday night
    • Sky Brightness Survey
      • Group has met
      • Need to coordinate the SQM meters and volunteers
      • First readings are probably going to start in December
      • darksky.org – using a camera and SQM meter when taking measurements
      • Discussion about urban light pollution and LED streetlights
  • Astrophotos – Brock Johnston
  • Astrophotos using the Slooh telescopes within the last few weeks – Joe Carr
  • Laurie Roche
    • FDAO Oct 30th AGM & presentation – Lauri Roche
      • ALMA – Brenda Matthews
      • Plaskett mirror re-aluminizing process – a 4 minute time lapse video will be posted soon
    • Astro Compass (W.W. Boes) from Frank Younger’s estate is available to any interested member – contact Lauri
    • RASC National Public Outreach
      • Solar Eclipses group being formed for 2023 and 2024 events
      • Need a contact from each Centre
  • Astro Cafe for Nov 15th – there will be a guest speaker
  • Driving Mercedes EQC to hunt for aurora (northern Norway) – a video by Tesla Bjorn – Mike Webb
  • Sedun’s southern Arizona ranch will be sold and Garry’s two telescopes will be installed on the Saanich Peninsula next year – Garry Sedun
  • Hubble Telescope report – Chris Gainor
    • Back in Safe Mode again
    • Most of the space craft is operating normally, but it’s not operational
  • James Webb Space Telescope – Chris Gainor
    • Launching on Dec 18th, but takes two months to unfold and arrive at the final Lagrange L-2 location
    • Tomorrow’s JWST Event or NASA TV at 8AM
    • Discussion about using the Lagrange locations
    • See also the Canadian Space Agency