Scott shares some hints on observing the night sky, using the Heavens-Above web site, and information on the the James Webb space telescope.
Hints (two more coming in the next few days)
- The field of view in the image is approximately 3.4 by 2.3 degrees and the same field is visible during most of the night on May 12th from Vancouver. That is not much to go on but look for further hints over the next few days.
- Asteroid Kalliope (magnitude 11) passes through the bottom left hand side of this field from May 3rd to May 12th, 2018.
- The image includes parts of the Virgo Galaxy cluster.
- The final hint is that the image contains several Messier objects including M58, M59, M60, M87, M89.
In this talk, Scott explains the TESS mission to hunt for exo-planets, recommends all of Steven Hawking’s books and Leonard Susskind’s “The Black Hole War”.
Science Rendezvous and Astronomy Day is today at Simon Fraser Univerity’s Burnaby campus from 11:00 am to 3:00 pm. Take advantage of the the clear skies to have a look through our solar scopes or to see stars in the daylight at the Trottier Observatory. Kids can enter a draw for binoculars provided by Markarian Fine Optics. Lots of other astronomy and science activities and parking is free!
Join us for Simon Fraser University’s Science Rendezvous and International Astronomy Day 2018. An exciting day full of interesting things to see and do, artistic performances and educational demonstrations and explorations at SFU’s Burnaby Mountain campus on Saturday, May 12, 2018, from 11:00 a.m. – 3:00 p.m., rain or shine.
RASC activities include an Apollo Rockets and Mission display, guest speakers, a solar telescope display and observing (weather permitting), and numerous craft and activity tables for children.
Guest speakers and presentations in the Academic Quadrangle room #AQ3150:
- 11:00 – 12:00, Robert Conrad: The use of Stellarium (free & easy to use astronomy software) to scan the skies.
- 12:15 – 12:45, Ted Stroman: The Moon 101 (Facts about our closest neighbour).
- 1:00 – 1:30, Ken Lui: The Global Space Community.
- 2:00 – 3:00, Robert Conrad : How to locate deep sky objects and ‘doomsday’ asteroids.
* Free admission to all shows, activities, talks and tours *
* Complimentary parking offered in East Parking lot *
* Open to participants of all ages *
Contents of Volume 2018, Issue 2, March-April-2018:
Blue, Blood, and “Supermoon” Eclipse by J. Karl Miller
President’s Message by Leigh Cummings
Planet 9: Is it Out There? by Don Duthie
The Chinese space station, TIANGONG-1 or “Heavenly Palace” is headed back to earth with re-entry likely happening tomorrow afternoon.
Its re-entry, unlike most, is uncontrolled as the space station became unresponsive in March, 2016. The latest forecasts remain highly variable but are centred in a window around 16:25 PDT on April 1st. This is later than originally predicted with the delay attributed to low solar activity, which has allowed Earth’s upper atmosphere to cool and shrink away from Tiangong-1 – less air means less aerodynamic friction and a slower decay. Check here for updates.
Most of the 8.5 tonne spacecraft will burn up in the atmosphere with 1.5 to 3.5 tonnes expected to impact the earth. The impact zone is from 43° North latitude to 43° south latitude and it is likely come down in an ocean rather than over land. So that excludes BC and most of Canada. Impact debris is typically heat resistant metal objects such as fuel tanks.
TIANGONG-1 is about the size of bus. It is much smaller than the 74 tonne Skylab space station that had an uncontrolled re-entry in 1979. Still, it would be a spectacular sight if you happen to be in the right place at the right time to see it. It will be visible even in daylight and will appear as a slow moving shooting star or fireball, a smoke trail might even be visible.
RASC’s Scott McGillivray talks about viewing the Humanity Star – the “disco mirror ball” that is currently in orbit; and his favourite upcoming space mission.
The following letter is from long time RASC Vancouver member Barry Shanko to let you know about his current health challenges and how you can help. Barry has been a wonderfully generous volunteer for our activities. In particular, as our Speakers Chair for many years, Barry ensured an interesting series of talks at our public lectures. Barry needs a new kidney, and we hope you will consider being tested to be a living donor.
Dear Fellow Members of the Vancouver Centre:
In reaching out to you I have to say this is the hardest letter I’ve ever had to write. My kidneys have failed and I undergo dialysis three times a week. This is a temporary fix; the best long term solution is a kidney transplant.
The waiting time for a deceased donor kidney is years and I have been advised to try and find someone who would be willing to donate one of their kidneys to me. I’m writing this letter with the hopes that you or someone you know will come forward to volunteer to be tested as a first step towards donation.
I understand this is a huge request, and I want you to be totally comfortable with your decision. No matter what you decide, I will respect it. If you are comfortable with saying yes, I hope you will consider stepping forward to be tested.
Life with dialysis is not easy. I need treatment three times a week, four hours per session. This is a great hit to my lifestyle, meaning that I have to plan my life around my appointments. It is almost as though I was attached to the machines via a leash. For example, on work days when I have dialysis, I leave for work at 7:30 am, but don’t get home until almost 10 in the evening. A new kidney would eliminate these restrictions and return me to a normal life.
This is also a hard thing for me personally. My mom died from kidney failure. She wasn’t able to have a transplant and eventually the dialysis stopped working. Her last few years were a constant cycle of dialysis and then rest until the next session. It wasn’t much of a life.
I’ve learned kidney donors are able to live normal and healthy lives with just a single kidney. Donors are carefully screened to make sure it is safe for them to give up a kidney. The testing is comprehensive and only if you pass the tests will you be asked to take the next step to donation. The transplant team makes the donor’s health and well-being a priority. Donors don’t have to be a relative, or even have the same blood type to volunteer. And should the worst happen and your single kidney fails, as a live donor, you would go straight to the top of the transplant list without having to wait in line.
I know I’ve given you a lot to think about. If you are interested in exploring the idea of a kidney donation and want more information, I’d urge you to start by checking out the BC Transplant website [www.transplant.bc.ca] or contact the VGH pre-transplant clinic at 604-875-5182 for more information. Just asking for information is not a commitment to going forward with it and you can stop at any point in the process. All of your contacts and information will be kept in the strictest confidence.
If you’d like, I’d be happy to talk with you confidentially about this and pass along more information.
Thank you for letting me share my information. If you know of someone you think would be interested in donating, feel free to pass this letter along to them. The wider the net, the better my chances.
Conventional round and curved lenses are the key element in refracting telescopes. While there have been advances in the materials used, the coatings, and the use of multiple lenses to correct distortions, basic lens design has not changed much since the time of Galileo.
Metalenses promise to revolutionize optics by replacing the bulky, curved lenses with a simple, flat surface.
A metalens takes a new approach to focusing light. Rather than exploiting the diffraction properties of glass, a metalens uses tiny pillars, typically made of titanium dioxide, to bend wavelengths toward the focal point.
The pillars are arranged in different patterns where each specific pattern focuses a different color of light. This short 2-minute video by Science Magazine does a good job of illustrating the concept in simple terms.
Recently, researchers from the Harvard School of Engineering have announced the development of the first single metalens that can focus almost the entire visible spectrum of light in the same spot. The Harvard metalens covers 470 nanometers (bold blue) to 680 nanometers (deep red) while a healthy eyeball reacts to wavelengths ranging from about 380 to about 700 nanometers. The Harvard metalens is a good prototype and additional advances may allow it to cover the whole visual spectrum.
A BC Company, NexOptic, has similar goals: to enable bigger apertures in small devices. They claimed to have developed a prototype telescope that was unveiled at the Macmillan Planetarium last year.
NexOptic has not revealed details on how their technology works but the prototype was evaluated on some moon images by a RASC-Calgary member, Larry McNish.
This is still early stage technology and a number of challenges remain for metalenses but hopefully it will enable dramatically smaller and lighter telescopes in the future.
RASC’s Scott McGillivray talks with Lynn Colliar about this week’s lunar eclipse, the Sapphire Space Telescope, and discoveries from the Messenger mission to Mercury.