Archivo de imágenes de Hubble
Cúmulos globulares alrededor de la Vía Láctea
This illustration shows the fundamental architecture of our island city of stars, the Milky Way galaxy: a spiral disk, central bulge, and diffuse halo of stars and globular star clusters. Not shown is the vast halo of dark matter surrounding our galaxy. A comprehensive survey tha...
- Fecha
- Jan 1, 2019
- Misión
- Hubble Space Telescope
- ID de archivo
- hubblesite-images-2019-16-4369-image
This illustration shows the fundamental architecture of our island city of stars, the Milky Way galaxy: a spiral disk, central bulge, and diffuse halo of stars and globular star clusters. Not shown is the vast halo of dark matter surrounding our galaxy. A comprehensive survey that combines the observing prowess of both the Hubble Space Telescope and the European Space Agency's Gaia satellite measured the total mass of our galaxy at 1.5 trillion solar masses. Only a few percent of the estimated 200 billion stars in our galaxy contributes to this total. Most of the rest is locked up in invisible dark matter. The precision of Hubble and Gaia each allowed astronomers to measure the movement of the isolated spherical islands called globular star clusters. The more massive a galaxy, the faster its clusters move under the pull of gravity. And, this allows for the mass of our galaxy to be calculated.
Credits
NASA, ESA, and A. Feild (STScI)Más imágenes de este periodo
Descargas
Fuente
La imagen y el material de referencia se acreditan al archivo oficial de la misión enlazado a continuación.
Ver en NASA.gov