Renuka Persuad won the Amateur Astronomers Association of Guyana Art Competition of 2018. The grand prize handed over to Ms. Persaud was a 70mm refractor telescope. Her artwork was judged the best among submissions received by the organizers of the competition.
This DIY guide includes everything you need to get started. This is a project worth every effort!
Credit to Dominic Ford. Originally produced by Dominic Ford.
Make your own Astrolabe
An astrolabe is an elaborate instrument which combines a mechanical model of the sky’s rotation through the night – similar to a modern planisphere – with an observing instrument which allows the altitudes of objects in the night sky to be measured. Put together, these two components can be used the time of day, by determining the altitude of a star, and also at what time of day the sky’s rotation brings it to that height above the horizon.
Zero, though a number without tangible value, has fostered within its hollowed essence, quite an enormous reputation over the ages. The “significant nothing” has played a revolutionary role in extending the boundaries of numerical computation, from its earliest applications by the human mind to its most recent. One would be surprised to know that after all this time, there is still so much we can learn from, well… nothing.
On July 27th, 2018, the Red planet will be almost direct opposite with the Sun in the sky. At midnight, the Sun would reach its maximum distance just below the horizon. At just opposite of the Sky, the maximum point would also be met. Coincidentally, a Total Lunar Blood Moon Eclipse will occur on this night (with totality visible specifically across the Eastern hemisphere).
Mars will pass by the opposition point–the point highest in the sky opposite the Sun’s greatest distance at horizon point–shining brighter while being closest to Earth by distance (35.8 million miles (57.6 million km) ) on July 31st. When Mars passes opposition and approaches perigee (closest distance to Earth) it becomes brighter, and thus, the best time to visually observe and even photograph the Red planet. Continue reading
Handout version can be downloaded here.