Norma Arm

The Norma Arm is a minor spiral arm of the Milky Way extending from and around its central hub region. The inner portion of the Arm is called Norma Arm in narrow meaning. The outer part of it is identified either with Cygnus Arm, which lies outside the Perseus Arm, or Outer Arm, which is located further away from the center of the Galaxy than Cygnus Arm. Norma Arm has a radius of 15.5 ± 2.8 kpc. It is named for the Norma constellation, through which the Arm as seen from Earth passes.

单词	Outer Arm
释义	Outer Arm 原声例句少儿百科之歌 Finally, the outer arm and the new outer arm are the final spirals avalanching in this song. 外臂和新外臂是这首歌中最后的旋臂。英语百科 Norma Arm The Norma Arm is a minor spiral arm of the Milky Way extending from and around its central hub region. The inner portion of the Arm is called Norma Arm in narrow meaning. The outer part of it is identified either with Cygnus Arm, which lies outside the Perseus Arm, or Outer Arm, which is located further away from the center of the Galaxy than Cygnus Arm. Norma Arm has a radius of 15.5 ± 2.8 kpc. It is named for the Norma constellation, through which the Arm as seen from Earth passes.
随便看	electrical irradiation Electrical isolation electrical isolation fiber electrical isolation fibre electrical isolation optical memory electricalities electricality electrical jack Electrical junction electrical junction box electrical kiln electrical kilowatts electrical knife electrical laboratory electrical laminate electrical lamination press electrical lateral curve logging electrical layout electrical lead electrical leak electrical leakage electrical leakage tester Electrical length electrical length phase shift electrical lesion