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Found 3 results

  1. This is a relatively important event in the course of human history - "Sounds of Mars - NASA's Insight Senses Martian Wind"
  2. No, I was writing quickly, and just assumed that the two Equinoxes would be when the Earth was exactly 1 AU away from the sun, but now that you mention it, there's no particular reason I should have assumed this. The 12-hour days have to do with tilt, and not distance. I also assumed that the Winter Solstice was when the Earth was at the maximum AUs from the Sun, and the Summer Solstice was when the Earth was at the minimum AUs from the Sun, but again, these were just automatic assumptions I made without even thinking about it (in fact, it's just about the exact opposite). This is, quite literally, something you learn in freshman science class, if not before (yes, I took Astronomy because it was an easy A). Do you think the 1-AU moments are exactly 3 months away from the perihelion and the aphelion? I couldn't find anywhere that says when they occur, although I did find one webpage that said they did occur exactly twice a year.
  3. Okay, half the people reading have no earthly (pun intended) clue as to what I'm talking about, so let me define some terms: Decuple (pronounced deck-CUP-pull) means "10" just like Triple means "3" or Quadruple means "4." Syzygy is an Astronomical term that's very simple: Anytime three celestial bodies are in a line, you have syzygy (it's nothing more than "a configuration.") The pronunciation is easy too: SIH-zih-gee. For example, anytime you have an eclipse, you have syzygy (three bodies in alignment), but an eclipse is just one of many, many examples. Here's one more term that many of you have probably heard: the "Transit of Venus." We had one of these a few years ago, and it's when Venus passes between the Earth and the Sun - the problem being that Venus is so small that you don't even notice it's happening. If Venus was large enough to block out the sun (it isn't), you'd have an eclipse; what you have instead is a Transit of Venus. And, you also have syzygy, i.e., the Sun, Venus, and Earth are all in alignment: You could draw a hypothetical straight line, and it would touch all three celestial bodies. So, my mind started to drift, and I began to wonder ... On Mar 21, 1894, from the perspective of Saturn (i.e., you're standing on Saturn), there were two simultaneous transits that took place: the Transit of Venus *and* the Transit of Mercury. Now bear in mind, this is from the perspective of Saturn - time for another term defined: An Astronomical Unit is the average distance that the Earth is from the Sun. Since Earth's orbit is elliptical, it's almost always a little more than 1 AU, or a little less than 1 AU. The actual distance is exactly 1 AU at exactly two moments per year: during the vernal and autumnal equinoxes, and even then, it's only for an instant - a period of time so short in duration that it essentially doesn't even exist. Okay, so the Earth is about 1 AU away from the Sun. Saturn, however, is almost 10 AUs away from the Sun, or about ten-times the distance from the Sun as the Earth is. So you can imagine how small the Sun would look if you were standing on Saturn. I don't know if it would be 1/10th the size, because I don't know if it's an exact inverse (I suspect it's more complicated than that, but regardless, the Sun would look pretty damned small). Now, I'm not certain that these simultaneous transits resulted in a quadruple syzygy. For a quadruple syzygy to have happened, you would need to be able to draw a mathematically perfect straight line, and have it touch the Sun, Mercury, Venus, and Saturn. Just because both Mercury and Venus were in transit doesn't necessarily mean they were in a straight line, but given how small the Sun must look from Saturn, they must have been pretty damned close - for a quadruple syzygy to have occurred, there would have had to have been a Venus-Mercury eclipse that took place during the double transit (I'm not even sure there's a term for this): Venus would have needed to eclipse Mercury *while* the two were in transit of the Sun (does that make sense?) In that case, you would have had a quadruple syzygy (again, I don't even know if this is a term); otherwise, you would have instead had two "regular" syzygys that happened to be *really* close together. I'm proposing the possibility of an decuple syzygy: I'm wondering if it is theoretically and physically possible for someone to be (hypothetically) standing on Pluto, and have every single planet in alignment. In other words, you could draw a straight line that would be touching the Sun, Mercury, Venus, Earth, Mars, Neptune, Saturn, Uranus, Neptune, and Pluto - ten celestial bodies that you could draw a line through. Actually, it doesn't matter if someone is standing on Pluto or not; the only thing that matters is the alignment. Assuming time sprawls forward into infinity, and that each planet orbits the sun at a different velocity, it's perfectly logical to hypothesize that, at some point - maybe trillions or quadrillions of years from now (assuming the Sun doesn't explode) - all ten celestial bodies in our solar system will be in alignment. Bear in mind: The planets all orbit the sun in the same plane; otherwise, this might be mathematically impossible; given that they *do* orbit in the same plane, I don't see how it *can't* happen, at some point in the ever-so-distant future. It should not take a very complex computer model to predict the exact moment in time when this would occur. It can actually become even more complicated than the scenario I've proposed: Some planetary moons are larger than Pluto, and Ceres - a dwarf planet in the asteroid belt - isn't all that far behind Pluto in size. So, yes, you could perhaps have dodecuple syzygy if 12 bodies were to be in alignment. Any thoughts on this, other than that I should maybe get a life, and maybe work on my restaurant reviews?
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