Thursday 9 July 2009

Gratis sterkaarte vir waarnemers

Gaan kyk bietjie na hierdie hoë kwaliteit sterkaarte wat José Ramón Torres and Casey Skelton op hulle webtuiste gratis beskikbaar maak.

The TRIATLAS Second Edition

- 3 full MAIN DEEP SKY ATLASES up to 9, 11 and 13 magnitude

- 2 standard-alone COMPLEMENTARY EDITIONS

As daar belangstelling is sal ek die sterkaarte ook op die Astronomy DVD beskikbaar maak. Laat weet asseblief voor ek begin aflaai.

Die grootte van al die lêers is so 945 megagrepe, as jy self wil inspring en aflaai.
Elke kaart is `n hoë kwaliteit pdf.

Monday 6 July 2009

Onverwagse sonvlek nou sigbaar

Waarskuwing: Moenie met jou blote oog na die son kyk nie. Ook nie met `n verkyker of teleskoop wat nie met die nodige sonfilters toegerus is nie!

Gaan loer op die veilige manier na hierdie sonvlek by www.spaceweather.com of kliek hier

Inligting verkry van Spaceweather.com:

SUDDEN SUNSPOT:
What a difference 48 hours can make. Only two days ago the sun was blank and calm, displaying the sort of unrelenting quiet we've come to expect from the deepest solar minimum in a century. Then, with startling rapidity, sunspot 1024 burst onto the scene: movie. Unlike other recent "sun-specks", this active region is a full-fledged sunspot group with more than a dozen planet-sized dark cores, crackling with B- and C-class solar flares.

"Sunspot 1024 is putting on a spectacular show," says amateur astronomer David Tyler of Buckinghamshire UK, who caught it in mid-flare on July 5th.

Kyk aanlyn wanneer Hubble en die ISS in jou omgewing sigbaar is!


Hier is `n nuttige aanlynprogram om te bepaal wanneer die Hubble-teleskoop en die Internasionale ruimtestasie in jou omgewing gaan sigbaar wees.

Volg die eenvoudig instruksies op die skerm en gou word `n lys van tye op die skerm uitgespoeg. Al wat jy moet kies is jou land, provinsie en dorp. Nie te moeilik nie. Maak vir jou `n uitdruk en gaan soek hom!

Let op die am en pm vir soggens en saans.

Sunday 5 July 2009

Ask the Astronomer

Besoek gerus hierdie webblad. Baie van jou vrae oor sterrekunde sal beantwoord word. Kliek op die verskillende afdelings. Dit gaan jou vir ure besig hou.
Hier is 'n voorbeeld van 'n vraag met `n antwoord.

How many meteors enter the Earth's atmosphere every day?

Lots!

In a recent article in the journal Nature, March 28, 1996 vol. 380, page 323, Dr.s A.D. Taylor, W. J. Baggaley and D. I. Street at the University of Adelaide in Australia discuss the results of their 1 year radar monitoring of incoming meteors. When meteorites slam into the atmosphere, they produce ionization in the atmosphere. Radar echos from this momentary ionization allow the velocity, altitude and distance to be determined if you have two or more such installations for triangulation. The AMOR radar in New Zealand was used for a year in this fashion to detect 350,000 faint echos from very small meteorites with sizes between 10 - 100 microns. This works out to nearly 1000 every day, just from this site alone! Over 1508 of these meteorites ( 0.9 percent) were found to be traveling at speeds up to several hundred kilometers per second!

On any given day, the estimates are than the Earth intercepts about 19,000 meteorites weighing over 3.5 ounces, every year of which fewer than 10 are ever recovered. About 2800 meteorites are in museums from previous 'falls' and are chemically found to represent about 20 or so distinct parent-bodies. The Earth acquires about 100 tons per day of dust-sized micro- meteoroids.

Wednesday 1 July 2009

Device Makes Radio Waves Travel Faster Than Light

Written by Nancy Atkinson

A scientist has created a gadget that can make radio waves travel faster than light. Einstein predicted that particles and information can't travel faster than the speed of light, but phenomena like radio waves are a different story, said John Singleton, who works at the Los Alamos National Laboratory.

Read more

Mach 1 can be quite visual.


What Supersonic Looks Like

The breaking of the sound barrier is not just an audible phenomenon. As a new picture from the U.S. military shows, Mach 1 can be quite visual.

This widely circulated new photo shows a Air Force F-22 Raptor aircraft participating in an exercise in the Gulf of Alaska June 22, 2009 as it executes a supersonic flyby over the flight deck of the aircraft carrier USS John C. Stennis.

Read more...

Tuesday 23 June 2009

35 000 mense wag langste dag in by Stonehenge

35 000 mense het die langste dag by Stonehenge op Salisbury-plein buite Londen ingewag. In Suid Afrika was die 21ste Junie die kortste dag.

Hopelik is doer onder in die Suide niemand in hegtenis geneem vir onbehoorlike gedrag nie.

Die Daily Mirror in Londen (kliek hier om berig te lees) berig dat net 37 mense in hegtenis geneem is vir kleiner oortredings.

  • Kliek op die foto om te vergroot.

    Groete
    Hannes Pieterse

Monday 15 June 2009

Tuesday 9 June 2009

Astronomy Starter CD (DVD)

Hallo daar.

Ons is besig om die Astronomy Starter CD (DVD) te herdruk/skryf. Die sagteware soos Cartes du Ciel, Lunar- en Stellarium se jongste weergawes is bygewerk. Dit maak dat die CD nou `n DVD is. Onthou CD staan vir Compact Disc en `n DVD is ook maar `n compact disc.
In die stadium gaan net 50 afdrukke gemaak word!
So die lid of voornemende lid wat eerste spring gaan die vars DVD kan gebruik.
  • Onthou dit is `n DVD wat jy met Internet Explorer bedryf. Dit werk dus soos die internet. Jy swerf op die DVD rond.
  • Stuur epos aan assabfn@gmail.com om jou kopie van die DVD te verseker.
  • Net 50 beskikbaar @ R40.00 per DVD. (Voorgestelde prys). Moenie nou al betaal nie.
  • As jy by die vereniging aansluit kry jy `n gratis DVD.
  • DVD sal vroeg in Julie beskikbaar wees.
Hier is bietjie meer inligting van al die Astro-inligting wat op die DVD beskikbaar is.

Groete

Hannes Pieterse


The Astronomy Starter Pack is the ideal tool for beginners who wish to know more about astronomy, spaceflight and sky watching.
Recommended for astronomy enthusiasts, science facilitators, teachers and parents with children interested in space. The pack is a first for South Africa and shows you exactly how to begin in the wide and exciting world of astronomy, spaceflight and sky watching. Read through fascinating facts and see some of the best photos taken by space telescopes and astronauts.

What you'll find on the Starter CD:
  • Over 40 concise pages of easy-to-understand information about astronomy, space exploration and sky watching
  • Expertly selected photos and images for your viewing pleasure; also for use in school tasks, expos and astronomy presentations.
  • Handy free software applications such as Celestia, Stellarium, Cartes du Ciel. Orbitron etc.
  • Links to websites of South African observatories and astronomy institutions as well as astronomy clubs and science centres.
  • Comprehensive list of internet links to astronomy websites.
  • A step-by-step guide on how to begin with sky watching outside
  • Information on binoculars and telescopes
    Printable sky maps for each season
  • ...and more.

Hallo daar aan al die astro-belangstellendes. Ek is bevoorreg om in San Francisco by `n kongres te wees. Maar dit word laat donker en ek kon die Morrison Planetarium besoek. My eerste keer in `n planetarium. Dit spook nog by my.
Hier is `n lusmaker. Besoek die webtuiste gerus: Kliek hier!
Groete
Hannes Pieterse