E3 Cards: Number 172

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File:172.jpg
Card 172


"There are over 2000 artificial satellites orbiting Earth. Can you name the coloured satellites shown here? The blue, yellow, and red dots are all constellations of satellites, while the green and purple dots are individual satellites."


Blue is Saturn, Yellow is Jupiter, Red is Mars, Green is Mercury, and Purple is Venus.


Because of the sizes, shapes, and outer limits of the dots/constellations. Isolating each color of dots, one reaches distinctive shapes. Blue is a somewhat large, round body, with a ring surrounding it. Its shape is reminiscent of Saturn. Its outer limits are the farthest of the dots (the ring), and that represents its orbit being the largest of the satellites shown. Yellow is the largest of those shown, round, and second farthest in orbit. Jupiter. Red is just slightly larger than Earth, and ends just outside Earth's orbit. Mars. The edge of the picture of Earth likely signifies its location in orbit compared to the three. Inside Earth's orbit are Venus and Mercury. The green dot is Mercury, because just the size of the dot is smaller. Also, the bluish circle under it, projected onto the image of the Earth, is the smaller of the two circles. The purple dot is Venus, because it is larger, and projects a wider circle. This may show its size relative to the Earth, or it could be a separate thing altogether.