Pages
Gallery
Categories
- Hyperstar III and SXVF-M26C
- Canon 200mm prime lens
- Astronomy Image of the Day
- Hyperstar III and Trius SX-814C
- Uncategorized
- Macrophotography
- Carbon Stars
- Picture of the Week
- High-Speed Photography
- Photomicroscopy
- Talks and Presentations
- Micro-Dragonfly Array
- Photographic courses
- Exhibitions
- CCD Images
- Published Work
- Site News
- Writing
- News
- Creating mosaics
- Star Vistas
- House and home
Visitors
Tags
Author Archives: Greg Parker
Fibonacci – Primes
Here are the first 200 Fibonacci numbers – and the list below shows whether they are Prime (True) or not (False). Courtesy of Mathematica. {1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144, 233, 377, 610, 987, … Continue reading
Posted in Projects
Leave a comment
Sunflower Seed-Head Again
Having spent the whole day on the Golden Ratio, the Fibonacci sequence, the Golden (Planar) Angle, and Phyllotaxis – here is a Mathematica produced piccie of the Sunflower seed-head pattern using 2,000 “seeds”.
Posted in Projects
Leave a comment
Yet Another Update on the Golden Ratio
The well-known Fibonacci sequence formed by summing consecutive terms looks like: 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89………. And a well known property of this sequence is that if you take the ratio of consecutive terms … Continue reading
Posted in Projects
Leave a comment
North America nebula region
Another star reduced version of an oldie. This time it’s the North America/Pelican nebula region of Cygnus taken with the 200mm lenses and the Trius M26C OSC CCDs. This is a 3-frame mosaic.
Posted in Canon 200mm prime lens, mini-WASP Array
Leave a comment
The Witch’s Broom Region
Another oldie that benefits greatly from a bit of star reduction.
Posted in Hyperstar and SXVF-M25C
Leave a comment
The Belt Stars of Orion
Another star-reduced image of an oldie.
Posted in Sky 90 and SXVF-M25C
Leave a comment
Mu Cephei – the Garnet Star
A reprocess of Mu Cephei.
Posted in mini-WASP Array, Sky 90 and SXVF-M26C
Leave a comment
Another (faint) ISS Pass
From 5:39 p.m. tonight – another faint ISS pass – this time due to a blazing Moon directly behind me. You can JUST see the ISS running across the middle of the image.
Posted in Projects
Leave a comment
4:50 p.m. ISS Pass
Tonight’s ISS pass in nautical twilight (too light really to take the image) – but you can just about make it out.
Posted in Projects
Leave a comment
Star-Reduced North America and Pelican nebulae
A star-reduced version of the North America and Pelican nebulae processed by Noel Carboni.
Posted in Sky 90 and SXVF-M26C
Leave a comment