NGC 1931, is an emission and reflection nebula in the constellation Auriga. The nebula has been referred to as a “miniature version of the Orion Nebula”, as it shares some of the same characteristics. It is a mixed emission-reflection nebula, and contains a smaller version of the Trapezium in its hot young star cluster centered in the emission nebula. The entire cluster/nebula complex is only about 3 arcmin in size. The distance from earth is estimated at about 7000 light years.
IC 417 is often called Spider Nebula. Approximately 7500 light years away it can be found in the constellation Auriga. IC 417 is a star forming area where local gas gatherings got destabilized by external events like shockwaves of supernovae. Under their own gravity they collapsed. The result of those processes is a young protostar deeply embedded in surroundig clouds of gas and dust. It is growing over time consuming surrounding matter. If temperatur and pressure reaches values high enough to ignite the hydrogen fusion, a star is born shining for million or even billions of years, depending on its mass.
The energy-rich radiation of the young stars is forming the extended gas clouds of IC 417 actively. Regions with lower gas density are getting eroded faster by the radiation than regions with a higher gas density. Thus holed structures develop inside IC 417 in vicinity of the stars.
NGC 1931 and IC 417
NGC 1931, is an emission and reflection nebula in the constellation Auriga. The nebula has been referred to as a “miniature version of the Orion Nebula”, as it shares some of the same characteristics. It is a mixed emission-reflection nebula, and contains a smaller version of the Trapezium in its hot young star cluster centered in the emission nebula. The entire cluster/nebula complex is only about 3 arcmin in size. The distance from earth is estimated at about 7000 light years.
IC 417 is often called Spider Nebula. Approximately 7500 light years away it can be found in the constellation Auriga. IC 417 is a star forming area where local gas gatherings got destabilized by external events like shockwaves of supernovae. Under their own gravity they collapsed. The result of those processes is a young protostar deeply embedded in surroundig clouds of gas and dust. It is growing over time consuming surrounding matter. If temperatur and pressure reaches values high enough to ignite the hydrogen fusion, a star is born shining for million or even billions of years, depending on its mass.
The energy-rich radiation of the young stars is forming the extended gas clouds of IC 417 actively. Regions with lower gas density are getting eroded faster by the radiation than regions with a higher gas density. Thus holed structures develop inside IC 417 in vicinity of the stars.
Photographed with the APO 107 refractor telescope and the ASI 2600MC color CMOS camera in Stuvsta, November 2021. Exposure was 20 * 4 min with post-processing in Pixinsight.
NGC 1931 and IC 417
NGC 1931, is an emission and reflection nebula in the constellation Auriga. The nebula has been referred to as a “miniature version of the Orion Nebula”, as it shares some of the same characteristics. It is a mixed emission-reflection nebula, and contains a smaller version of the Trapezium in its hot young star cluster centered in the emission nebula. The entire cluster/nebula complex is only about 3 arcmin in size. The distance from earth is estimated at about 7000 light years.
IC 417 is often called Spider Nebula. Approximately 7500 light years away it can be found in the constellation Auriga. IC 417 is a star forming area where local gas gatherings got destabilized by external events like shockwaves of supernovae. Under their own gravity they collapsed. The result of those processes is a young protostar deeply embedded in surroundig clouds of gas and dust. It is growing over time consuming surrounding matter. If temperatur and pressure reaches values high enough to ignite the hydrogen fusion, a star is born shining for million or even billions of years, depending on its mass.
The energy-rich radiation of the young stars is forming the extended gas clouds of IC 417 actively. Regions with lower gas density are getting eroded faster by the radiation than regions with a higher gas density. Thus holed structures develop inside IC 417 in vicinity of the stars.
Photographed with the APO 107 refractor telescope and the ASI 2600MC color CMOS camera in Stuvsta, November 2021. Exposure was 20 * 4 min with post-processing in Pixinsight.
