How long is a parsec




















Registered: Jul 3, Here as well: Parsec- A unit of a distance equal to that required to cause a heliocentric parallax of one second of an arc, equivalent to , times the distance from the earch to the sun or 3. Used in astronomical measurements. PadmeSolo , Apr 30, Registered: Sep 26, Lucas messed up when he had Han say that line about the Kessel Run. A parsec is a unit of distance.

LadyPadme , Apr 30, Registered: Jan 12, Right, a parsec is a unit of distance used in astronomy the EU has tried to explain Han's statement by saying that Han didn't have to get within twelve parsecs of Kessel I suppose that would mean the GFFA had a different definition than ours, since 12 parsecs would put him on the other side of the galaxy.

Ty-gon Jinn , Apr 30, Registered: Apr 9, This has been explained my LFL before. To fit it in with continuity, Han meant this: The Kessel run would invovle going around the Maw cluster.

Because the gravity of black holes afect a ship more strongly when they are closer, most ships have to stay far away from the Maw. Because the MF is so fast, though, Han was able to pilot it close to the Maw cluster, thereby making his trip a mere 12 parsecs in length. It works if you think of it in this way. Registered: Apr 30, The definition comes from how we measure distances Now without moving your arm, open your eye and close the other Close just your left eye and observe where your finger appears against the background; next, open your left eye and close your right.

Your finger will appear to shift because each eye views it from a slightly different angle. Translated to the stars in the sky, two photographs of the same nearby star taken six months apart will show it appearing to move against the background of more distant stars because Earth has moved to the other side of the Sun in its orbit.

And a parsec is the distance — 3. Although astronomers often measure distant objects in parsecs or megaparsecs 1 megaparsec is 1 million parsecs , only nearby objects have parallaxes, or shifts on the sky, that we can actually measure. It can measure, to within 20 percent accuracy, the distances of stars that lie tens of thousands of light-years away.

Receive news, sky-event information, observing tips, and more from Astronomy's weekly email newsletter. View our Privacy Policy. By signing up you may also receive reader surveys and occasional special offers. We do not sell, rent or trade our email lists. Login or Register Customer Service. RISE —. PHASE —. Tonight's Sky — Change location. US state, Canadian province, or country. Somehow able to withstand the forces involved perhaps it has something to do with that sweet tractor-beam tech , we can calculate what happens when Han and his baby go Because of special relativity, time dilates or expands outward as the moving observer travels faster and faster.

The faster Han goes, the less time he experiences — even if we see him traveling over light years. This is what Han Solo experiences in the Millennuum Falcon. At these ludicrous speeds, time itself contracts. A clock running on a ship moving Not only do clocks obey this contraction, but biology does too. Anyone on a hypervelocity ship will age more slowly than those not on the ship.

For example, if we transport a super-accurate atomic clock across the globe by plane , we have to correct for the discrepancy between it and another clock on the ground. After six months in the International Space Station, orbiting astronauts have aged 0.

Unfortunately for Han Solo — and the larger hope of long-distance, high-speed travel — time only contracts for the person who's moving. Within the Expanded Universe , Kevin J. Anderson later retconned an explanation: the Kessel Run is through the Maw. Event horizons around black holes are dependent on the speed at which you are traveling. A standard ship has to do the run in eighteen parsecs because to cut the route any closer, the ship would get sucked in.

The Millennium Falcon. The Falcon , however, is fast enough to straighten the route and cut over six parsecs off the distance traveled. The director's commentary on the Blu-Ray Star Wars set explains that hyperspace travel requires heavy computation to compute a path that does not cause you to fly through a star.

The Millennium Falcon has customized computation engines that calculate shorter hyperspace paths more quickly than those in other ships.



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