On Earth, stars and planets seem to disappear at dawn and then
reappear at dusk. Where...
Al. On Earth, stars and planets see Where are they during daylight hours? Barth, stars and planets seem to disappear at dawn and then reappear at dusk. a) in what manner are the positions of the planets geometrically restricted in the night sky of Earth? b) In what ways are the possible locations of Venus and Mercury in the night sky more restricted than for other planets, and why is this the case? A3. As viewed from the Earth, why are the changing positions of Mars and the outer planets (against the background stars) sometimes characterized by distinct loop-like and retrograde paths over time? A4. Over periods of decades, star charts can be re-used from year to year (c.8, the spatial distribution of stars visible in the night sky from Lubbock on February 6, 2018, at a particular time will be essentially identical for the same date and time in 2035). Can charts of planetary positions similarly be re-used from year to year? Why or why not? A5. Why is it basically impossible for any planet to appear due north in the sky (e.g., within 5 degrees of Polaris) when viewed from a northern hemisphere site such as Lubbock? A6. In what way did the overall geometry of the constellations strongly suggest to ancient thinkers that the Earth is a spheroid suspended in space? A7. A person wishes to live in a location where both the north and south celestial poles are visible, at least theoretically. What kind of location would potentially allow for this kind of view, and why?