What is Andromeda: Definition and 66 Discussions

In Greek mythology, Andromeda (; Greek: Ἀνδρομέδα, Androméda or Ἀνδρομέδη, Andromédē) is the daughter of the king of Aethiopia, Cepheus, and his wife, Cassiopeia. When Cassiopeia boasts that she is more beautiful than the Nereids, Poseidon sends the sea monster Cetus to ravage the coast of Aethiopia as divine punishment. Andromeda is chained to a rock as a sacrifice to sate the monster, but is saved from death by Perseus, who marries her and takes her to Greece to reign as his queen.Her name is the Latinized form of the Greek Ἀνδρομέδα (Androméda) or Ἀνδρομέδη (Andromédē) 'ruler of men', from ἀνήρ, ἀνδρός (anēr, andrós) meaning 'man, husband, human being', and μέδω (medō) 'I protect, rule over'.
As a subject, Andromeda has been popular in art since classical times; it is one of several Greek myths of a Greek hero's rescue of the intended victim of an archaic hieros gamos (sacred marriage), giving rise to the "princess and dragon" motif. From the Renaissance, interest revived in the original story, typically as derived from Ovid's Metamorphoses (4.663ff).

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  1. H

    Trip to Andromeda by transporter

    I'm fulfilling my life-long dream of learning relativity theory by working through Taylor and Wheeler's Spacetime Physics. I've successfully made it through the first three chapters except for one problem, 1-10 on p. 23: Samantha is beamed from Earth via a transporter to the planet...
  2. M

    Andromeda paradox and empirical consequences

    The https://www.physicsforums.com/archive/index.php/t-240147.html" occurred to me several years ago when I was still chasing relativity by the tail. I didn't learn that Rietdijk, Putnam, and Penrose had advanced this argument till yesterday. Weird. Anyway there are direct testable consequences...
  3. Z

    Why is the closing velocity of Andromeda and our galaxy so high?

    Why is the closing velocity of Andromeda and our galaxy so high? 100-140 kms^-1 http://en.wikipedia.org/wiki/Andromeda_(astronomy)"
  4. Ookke

    Rietdijk-Putnam Argument: Free Will, Relativity & The Andromeda Paradox

    Wikipedia: http://en.wikipedia.org/wiki/Rietdijk-Putnam_Argument Quote: "Two people pass each other on the street; and according to one of the two people, an Andromedean space fleet has already set off on its journey, while to the other, the decision as to whether or not the journey will...
  5. C

    The Andromeda Paradox: Exploring the Rietdijk-Putnam Argument

    http://en.wikipedia.org/wiki/Rietdijk-Putnam_Argument"
  6. R

    Orbits of Andromeda and Milky Way Galaxy About Each Other

    The orbits of the Magellanic Clouds about the Milky Way Galaxy have apparently been determined, and the two dwarf irregular galaxies are now about as close as they will get to the MW in their 2.2 billion year orbit. See p. 42 of "Our Growing, Breathing Galaxy" by Wakker and Richter, Scientific...
  7. D

    Relativity : Traveling to Andromeda galaxy

    Homework Statement An astronaut wishes to visit the Andromeda galaxy 2 million light years from Earth. He wishes the one way trip to take him 30 years (ie in the frame of reference of the spaceship). Assuming that his speed is constant, how fast must he travel? Homework Equations...
  8. Q

    Does Andromeda contain dark matter?

    Does Andromeda contain dark matter? Is the newly discovered halo able to account for the rotation of the galaxy?
  9. C

    Andromeda 5x bigger than previously thought.

    The article from space.com: http://www.space.com/scienceastronomy/070107_andromeda_halo.html I have a question about the article. What do current galaxy formation theories say about why the cores of galaxies like Andromeda have more metal-rich stars than their halos do? I am guessing...
  10. W

    When will Andromeda galaxy look as big as the moon today?

    Since our galaxy and the andromeda galaxy are drifting towards each other. How long will it take to look as big as the moon today in the night sky?
  11. I

    Special Relativity Andromeda galaxy Question

    The Andromeda glaxaxy is two million light-years from earth, measured in the common rest frame of the Earth and Andromeda. Suppose you took a fast spaceship to Andromeda, so it got you there in 50 years measured on the ship. If you sent a radio message home as soon as you reached Andromeda, how...
  12. russ_watters

    What Challenges Did I Face in Capturing Images of the Andromeda Galaxy and Mars?

    New pics. These are a month old, but I forgot to upload them. They are from Sept 29. That was the first night it got really cold and I drove to the Poconos to set up shop, so while the sky was very clear and very dark, it was also very windy. First is another shot at the Andromeda Galaxy...
  13. vincentm

    [Andromeda] Fast traveling stars

    http://www.space.com/scienceastronomy/050920_andromeda_stars.html
  14. N

    Make out the position of Andromeda

    Very quiet around the board today. And yesterday. Where is everybody? I spent a night in the deep woods, lying on my back on the ground, looking at the stars. There was very little silence in the woods. The peepers have been joined by chorus frogs and tree frogs, and they are raving in...
  15. tony873004

    Is the Andromeda Galaxy going to collide with the Milky Way?

    Is the Andromeda Galaxy going to collide with the Milky Way? I've heard that the Andromeda Galaxy is going to collide with the Milky Way someday. I understand how its radial velocity relative with respect to the Milky Way is determined through its blueshift, but how do we know its tangental...
  16. B

    Why is it easier to measure overall structure of Andromeda Galaxy than

    Why is it easier to measure overall structure of Andromeda Galaxy than to measure Milky Way Galaxy?
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