By James Muirden
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Additional info for Astronomy with Binoculars
Suppose for a moment that the Earth's axis were vertical. The equator and the ecliptic would then coincide, the Sun would always have the same altitude, and there would therefore be no seasons. All the planetary orbits are in very nearly the same plane, and this means that their paths must follow the ecliptic very closely. Just as the Sun is highest (to a northern observer) when crossing the midsummer point on June 21, so is a planet. When it is near the midwinter part of the ecliptic it never rises high in the sky and so is difficult We can to observe adequately.
Most easily understood by supposing the Sun to move round the Earth; it lies in the plane of our orbit, and wherever it moves it marks out that plane. Suppose for a moment that the Earth's axis were vertical. The equator and the ecliptic would then coincide, the Sun would always have the same altitude, and there would therefore be no seasons. All the planetary orbits are in very nearly the same plane, and this means that their paths must follow the ecliptic very closely. Just as the Sun is highest (to a northern observer) when crossing the midsummer point on June 21, so is a planet.
5. Map of the Moon ASTRONOMY WITH BINOCULARS 28 miles over the rugged, bleak landscape. midday (at Full puzzle for many years. We now fracturing of the surface Through pacts occurred. Rays are best seen at they dominate the disk), and they remained a when think that they must be due to these very late crater-forming im- these fractures crept the glasslike mate- from beneath the crust that now reflects the sunlight so well. Another lunar landmark is the beautiful Sinus Iridum, or Bay of Rainbows, on the northern shore of the Mare Imbrium.