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Very cool. On Voyager 2 we placed a map on the side of the probe that places the position of our sun based on an array of Pulsar stars (the map was designed by
by waynecochran 5mo ago
Very cool. On Voyager 2 we placed a map on the side of the probe that places the position of our sun based on an array of Pulsar stars (the map was designed by Carl Sagan). I noted in the PHM movie Rocky and Dr Grace made similar 3D maps (I think they were pulsars(?)). I guess pulsars form natural beacons that can be detected at large distances.
- twoodfin 5mo agoPulsars also have a rotational period that provides a reference point for interpreting arithmetic notation.
- shagie 5mo agoCosmos : The Shores of the Cosmic Ocean - https://youtu.be/x-bJLG9_sUg?si=1K96fMX2T9iXu0zA&t=783 https://youtu.be/x-bJLG9_sUg?si=1K96fMX2T9iXu0zA&t=783 For the "how far?" https://www.aanda.org/articles/aa/full_html/2011/04/aa16141-10/aa16141-10.html https://www.aanda.org/articles/aa/full_html/2011/04/aa16141-... We can get timing (rather than imaging) parallax... > We find that with the first method a parallax with an accuracy of 20% or less can be measured up to a maximum distance of 13 kpc, which would include 9000 pulsars. By timing pulsars with the most stable arrival times for the radio emission, parallaxes can be measured for about 3600 ms pulsars up to a distance of 9 kpc with an accuracy of 20%. (one kpc is 3261 light years) Not only can they be detected at large distances, but measurements of how far can be done at greater distances than can be done with imaging ( https://www.youtube.com/watch?v=hFMaT9oRbs4&t=608s https://www.youtube.com/watch?v=hFMaT9oRbs4&t=608s ).
- hgoel 5mo agoI thought the maps they made were of the neighborhood of stars around Tau Ceti, marking their respective home stars with the petrova line.
- waynecochran 5mo agoI believe you are correct. Way too close to use pulsars…