This is an accessorie for Sega Toys Homestar Pro Original home planetarium
The disc shows Earth from above the Christmas and Cocos Islands, not far from Indonesia's capital Jakarta. A bright full moon is visible in the back. Sun, the viewer, Earth and the Moon are almost on one line. While the viewer is located about 700 000 km above the Earth towards the sun, the moon lies about 384 400 km in the opposite direction behind the Earth. This constellation is very rare and might have occured for example on 1 March 2002. In a perfect alignment, Earth's shadow would be visible on the Moon, which is known as a lunar eclipse. On the discs, Earth and Moon have been magnified fifty times in order to make details visible to the human eye.
The night discs shows Earth from above the Red Sea berween Eritrea and Yemen. The full moon is visible in front and from the far side, which is not illuminated by the sun. The viewer, Moon, Earth and the Sun are almost on one line. While the viewer is located about 700 000 km above the Earth away from the sun, the moon lies about 384 400 km in between the viewer and Earth. The constellation might have occured on 9 November 2011. In comparison with the days discs, the moon is only about a third as far, making it much bigger on the night disc. On the discs, Earth and Moon have been magnified fifty times in order to make details visible to the human eye.
