Starship Asterisk*

A lovely sequence. It is also a good example of refraction. The 'tangents' to the six images are in a noticeable curve, caused by the decreasing refractive 'uplift' as the elevation above the horizon increases.

"So the most distant sunrise occurs during northern summer, when the planet's north pole is tilted toward the Sun and the north enjoys longer, warmer days." Conversely, the Sun is closest in the Southern Hemisphere Summer. That is why New Zealand, Australian, South African and South Americ...

Is not the "length of sunrise" the time between the appearances of the upper and lower limbs? At the 2021 Southward equinox, the Sun's apparent diameter was 31.8'. The Sun's declination (= the earth's tilt) was 0° 15.9' N at about 02:59 UTC on 22nd Sept, and 0° 15.9' S at about 11:41 UTC o...

Fascinating photo. Around 60 degrees North at around a local time of 2300, looking North West, gives the correct Sun / star / Perseus aspects for 13th August 2011 (or any other year!). That doesn't help much with longitude. But whilst orienting the stars, I noticed the double red object about 4.5 me...