Ground-based View of the Milky Way (Z. Levay)

Ground-based View of the Milky Way (Z. Levay)

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Fast Facts
News release ID: STScI-2018-01
Release Date: Jan 11, 2018
Image Use: Copyright
About this image

View of the Heart of our Milky Way from Earth

The vast edge-on stretch of our home galaxy, the Milky Way, is seen intersecting the night sky above the silhouetted Rocky Mountains in this photograph. The Milky Way noticeably widens at lower right. This wider area is the central hub, or bulge, of our galaxy.

Peering into a very narrow region of the core, astronomers used the Hubble Space Telescope to study the compositions and motions of 10,000 Sun-like stars, as seen in the inset Hubble image. The analysis reveals that our galaxy's bulge is an unexpectedly dynamic environment of stars of various ages zipping around at different speeds, like travelers bustling
about a busy airport. The study yields important new clues to the complexity of the central bulge and our Milky Way's evolution over billions of years.

The Hubble image is a composite of exposures taken in near-infrared and visible light with Hubble's Wide Field Camera 3. The observations are part of two Hubble surveys: the Galactic Bulge Treasury Program and the Sagittarius Window Eclipsing Extrasolar Planet Search.

The center of our galaxy is 26,000 light-years away.

American Astronomical Society Meeting, Annotated, Astronomical, Galactic Center Survey, Hubble Telescope, Milky Way, Milky Way Center, SWEEPS


NASA, ESA, and Z. Levay (STScI)