In doing so, we'll look outward from our own Orion Spur
to the neighboring Perseus Arm of the Milky Way.
Using the National Radio Astronomy Observatory's Very Long Baseline Array of telescopes in New Mexico, the team gathered data about the radio emissions in eight regions around the Local Arm, which is also called the Orion Spur
, to assess where the star-forming regions were.
Our Sun's place in the Milky Way Galaxy is on the inner edge of a spiral-arm fragment called the Orion Spur
. During northern winters, Earth's evening side faces into this arm and its many young, blue-white giant stars.
Our solar system is located about two-thirds of the way out from the Milky Way's center, in the Orion Spur
, an offshoot of the Perseus spiral arm.
The sun lies in a small partial arm, dubbed the Orion Spur
, between the Sagittarius and Perseus arms.
At only a few dozen to a few hundred lightyears away, they're practically right next door in our own Orion Spur
. The Milky Way star clouds northwest of Delphinus are also thousands of light-years closer to us, in the Cygnus and Perseus Arms.
Our Sun resides in the Milky Way Galaxy, on the inner edge of a spiral-arm fragment called the Orion Spur
. During northern winters, Earth's night side faces this arm and its nearby stars, many of them young, blue-white giants.
Our Sun dwells in the Milky Way Galaxy near the inner edge of a spiral-arm segment known as the Orion Spur
or Local Arm.
The rest of the clusters in this tour share the Orion Spur
with our Sun and are strung along it at various distances from us.
Our solar system is currently passing through one of our galaxy's lesser spiral arms, which is called (among many other aliases) the Orion-Cygnus Arm, Local Arm, Orion Arm, or Orion Spur
. We're located near this arm's inner edge.
And the Orion-Cygnus Arm is often called the Orion Arm, Orion Spur
, or Local Arm.
The new data suggest that the Orion Spur
, once thought to be merely a hiccup between the Sagittarius and Perseus Arms (see the July issue's foldout), is more likely a full-fledged branch of the Perseus Arm.