This sky map shows the velocity field of the Milky Way for 26 million stars. Several globular clusters appear as tiny dots in the image, such as 47 Tucanae, the dark dot on the immediate left of the SMC. These stars pulsate at regular intervals and can be seen through the galaxy’s immense clouds of interstellar dust that can make dimmer stellar bodies hard to spot. The Sagittarius dwarf galaxy is visible as a faint quasi-vertical stripe below the Galactic Centre. The astronomers tracked the Cepheids using the Warsaw Telescope located in the Chilean Andes. Scientists could not give an exact answer. They are relatively young - younger than 400 million years - so we can find them near their birthplaces.” The galactic disk is a map of our universe, with an exact marking of the solar system, several thousand years old.
GALACTIC DISK MAP GENERATOR
Even a map generator that dealt with only 1/100,000th of the data would be mind-bogglingly huge. The MilkywayHome project is a ginormous effort just to map our own galaxy.
The Milky Way is a spiral galaxy comprised of a bar-shaped core region surrounded by a flat disk. A true galaxy map must map hundreds of billions of stars and quadrillions (if not more) planets, asteroids, nebula, etc., etc. have traced the warp of the Milky Ways stellar disk to beyond 20 kpc. “Cepheid variables are bright supergiant stars and they are 100 to 10,000 times more luminous than the sun, so we can detect them on the outskirts of our galaxy. These new findings shed light on the warped, twisted shape of the galaxy's disk, researchers added. Using precise distances to more than 1,300 classical Cepheids, Chen et al.
“Cepheids are ideal to study the Milky Way for several reasons,” added University of Warsaw astronomer and study co-author Dorota Skowron. The new map was formulated using precise measurements of the distance from the sun to 2,400 stars called “Cepheid variables” scattered throughout the galaxy. Until now, the understanding of the galaxy’s shape had been based upon indirect measurements of celestial landmarks within the Milky Way and inferences from structures observed in other galaxies populating the universe.
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