Скачать или смотреть The Shape of Sagittarius in Three Dimensions

This visualization reveals stars of the Sagittarius constellation in three dimensions. Watch as the familiar pattern on the sky distorts into a whole new perspective.

The sequence starts with a view of the asterism called the "Teapot", the most recognizable feature of the constellation Sagittarius. In the background, like steam coming out of the spout of the teapot, is our galaxy, the Milky Way. That same spout, or the tip of the arrow of the archer, points towards the bright center of the Milky Way, covered by deep layers of interstellar dust. To the right of Sagittarius, between it and the constellation Scorpius, the Messier 7 star cluster is easily visible, over 900 ly away.

As the camera starts to orbit around the stars of Sagittarius, the true depth of the layers of dust covering the center of the Milky Way begins to reveal itself in three-dimensional space and the constellation slowly morphs into an elongated shape.

This visualization features over 11 million stars down to a magnitude of 13.5 across the sky. The positions, colors, and luminosities are based on the Gaia and Hipparcos star catalogs, complemented by the HYG Database, which includes data from the Yale and Gliese catalogs. Insterstellar dust is visualized using the Edenhofer map out to a distance of 1.25 kiloparsecs (~4,000 ly) from the Sun. The rest of the Milky Way plane is recreated using simulated spiral galaxy data for stars and dust from the Horizon GalMer database.

Credits:
Visualization: Christian Nieves, Frank Summers (STScI)
Motion Graphics: Ralf Crawford (STScI)
Music: Christian Nieves (STScI)
Data:
Gaia DR3 – ESA/Gaia/DPAC
Hipparcos Catalog – ESA
HYG-Database (v4.1) – Astronexus CC BY-SA 4.0
Edenhofer et al (2023). A Parsec-Scale Galactic 3D Dust Map out to 1.25 kpc from the Sun -- Dataset for the 1.25 kpc 3D Dust Map and the 2 kpc 3D Dust Map (v1.0.2) [Data set]. Zenodo.
Horizon GalMer Database – Chilingarian I. V., Di Matteo P., Combes F., Melchior A.-L., Semelin B., 2010, A&A, 518, A61

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