The Horsehead Nebula in Orion (see Figure 13-5 in the text) is a distinct dark region surrounded by brighter regions. The Horsehead is an example of 
A) an emission nebula.
B) a black hole.
C) a Bok gobule.
D) a dark nebula.
Correct Answer:
Verified
Q48: The Jeans instability describes the
A) explosion of
Q49: The distinctive color of a reflection nebula
Q50: The group of stars that is formed
Q51: The distinct blue color of the nebulosity
Q52: What condition is considered sufficient for an
Q54: Dark nebulae are extreme examples of
A) interstellar
Q55: How do massive stars normally end their
Q56: The MOST likely places in which stars
Q57: In photographs, the Pleiades open star cluster
Q58: Which of these statements about open star
Unlock this Answer For Free Now!
View this answer and more for free by performing one of the following actions
Scan the QR code to install the App and get 2 free unlocks
Unlock quizzes for free by uploading documents