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New!!
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Monthly Meetings
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10 September 2008 @ 8:00pm
JOHANNESBURG PLANETARIUM!!
Regular Meetings Monthly meetings are usually held on the second Wednesday of every month (except December) at the Old Republic Observatory in Johannesburg, and when the meeting takes place at the Johannesburg Planetarium
for directions to the planetarium click here
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Canopus
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Other ASSA Centres
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Johannesburg, ZA
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Announcements
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Lost & Found - Wedding Ring at ATM Class - Posted - 28 August 2008 John Scott of Parktown Boys High found a wedding ring under a table in the room of the Saturday ATM grinding class. He first asked the students . . . . but no one was courageous enough to come forward and own up. The ring was uncovered on the floor, August 20th in a workshop cleanup. Anyone's finger who's feeling naked and wants to regain their dignity I possess that golden opportunity to retain such bliss. Regards Julian Shellard
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Special talk on the Herschel Siblings - Andrew Burns - Posted - 31 July 2008“The Herschel Siblings” - John's father, uncle and aunts and how events in the family history may have moulded the polymath John we know in South Africa. read more...
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Total Solar Eclipse of 2008 August 01 - Posted - 05 July 2008
On Friday, 2008 August 01, a total eclipse of the Sun is visible from
within a narrow corridor that traverses half the Earth. The path of the
Moon's umbral shadow begins in Canada and extends across northern
Greenland, the Arctic, central Russia, Mongolia, and China. A partial
eclipse is seen within the much broader path of the Moon's penumbral
shadow, which includes northeastern North America, most of Europe and
Asia.
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Milky Way with the Spitzer Space Telescope - Posted - 16 June 2008 More than 800,000 frames from NASA's Spitzer Space Telescope were stitched together to create this infrared portrait of dust and stars radiating in the inner Milky Way. As inhabitants of a flat galactic disk, Earth and its solar system have an edge-on view of their host galaxy, like looking at a glass dish from its edge. From our perspective, most of the galaxy is condensed into a blurry narrow band of light that stretches completely around the sky, also known as the galactic plane. In this mosaic the galactic plane is broken up into five components: the far-left side of the plane (top image); the area just left of the galactic center (second to top); galactic center (middle); the area to the right of galactic center (second to bottom); and the far-right side of the plane (bottom). From Earth, the top two panels are visible to the northern hemisphere, and the bottom two images to the southern hemisphere. Together, these panels represent more than 50 percent of our entire Milky Way galaxy.
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Ghostly Rings - 29 May 2008
This
image shows a ghostly ring extending seven light-years across around the corpse
of a massive star. The collapsed star, called a magnetar, is located at the
exact center of this image. NASA's Spitzer Space Telescope imaged the mysterious
ring around magnetar SGR 1900+14 in infrared light. The magnetar itself is not
visible in this image, as it has not been detected at infrared wavelengths (it
has been seen in X-ray light).
Magnetars are formed when a giant star ends its life in a supernova explosion,
leaving behind a super dense neutron star with an incredibly strong magnetic
field. The ring seen by Spitzer could not have formed during the original
explosion, as any material as close to the star as the ring would have been
disrupted by the supernova shock wave. Scientists suspect that the ring my
actually be the edges of a bubble that was hollowed out by an explosive burst
from the magnetar in 1998. The very bright region near the center of the image
is a cluster of young stars, which may be illuminating the inner edge of the
bubble, making it look like a ring in projection.
This composite image was taken using all three of Spitzer's science instruments.
The blue color represents 3.6-micron infrared light taken by the infrared array
camera, green is 16-micron light from the infrared spectograph, and red is
24-micron radiation from the multiband imaging photometer.
(Image credit: NASA/JPL-Caltech)
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Stephen Hawking Meets Nelson Mandela - Posted - 15 May 2008The world’s most famous scientist, Professor Stephen Hawking, today met with former President Nelson Mandela for the first time. Professor Hawking is in South Africa to launch the Next Einstein initiative, to discover and nurture maths and science talent all over Africa. The initiative builds on the success of the African Institute for Mathematical Sciences, AIMS, a pan-African centre for postgraduate training and research, based in Muizenberg, Cape Town. AIMS has so far graduated 160 young scientists from 30 African countries and an additional 53 students, including 20 women, are currently completing the programme. read more ...
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Events
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