This Digitized Sky Survey image shows the oldest star with a well-determined age in our galaxy. Called the Methuselah star, HD 140283 is 190.1 light-years away. Astronomers refined the star's age to about 14.5 billion years (which is older than the universe), plus or minus 800 million years. Image released March 7, 2013.
This is an illustration of the oldest star ever found in our solar neighborhood. The aging star, cataloged as HD 140283, lies 190.1 light-years from Earth. Astronomers refined the star's age to about 14.5 billion years (which is older than the universe), plus or minus 800 million years.
Astronomers used the Hubble Space Telescope orbiting Earth to observe the Methuselah Star HD 140283 - the oldest known star in the sun's solar neighborhood.
This artist's view shows the oldest known star HD 140283, which is about 190.1 light-years from Earth. Astronomers say the star looks like it is up to 14.5 billion years old, which would be older than the universe, if true. Because the aging star is relatively nearby, familiar stars and constellations as seen from Earth are in the sky, but in different locations, as seen in this annotated view.
At upper left is the constellation Orion, which looks distorted from our new perspective in space. Just to the upper left of the foreground star is the Pleiades cluster. To the lower left of the cluster, our Sun has dimmed to an apparent magnitude of +7, placing it below naked-eye visibility.
This is a backyard view of the sky surrounding the ancient star, cataloged as HD 140283, which lies 190.1 light-years from Earth. The star is the oldest known to astronomers to date. Image released March 7, 2013.
Distances to stars comparatively near to our Sun can be measured using trigonometric parallax. This can only be done if the star is close enough to show an apparent shift in position relative to much farther background stars, as seen at upper right. This requires viewing the star on two occasions, when Earth is at opposite sides of the Sun (seen at lower left). The Hubble Space Telescope can then precisely measure the very small angular displacement of the star between observations. When the offset value is combined using geometry with the value for Earth's orbital diameter, a precise distance can be calculated.