The BN object in the Orion molecular cloud is believed to be
A) a star cluster hidden in dust clouds.
B) a forming star nearing the main sequence.
C) a low-mass star fusing hydrogen in its interior.
D) a low-density gas cloud heated by a shock wave.
E) a black hole radiating large amounts of x-ray radiation.
Correct Answer:
Verified
Q9: _ are small luminous nebulae excited by
Q11: Main sequence O stars have convective cores
Q13: The nuclear reactions in a star's core
Q13: Interstellar gas clouds may collapse to form
Q16: The central cores of massive main sequence
Q17: If the sun produces energy by the
Q18: _ occurs when most of the material
Q19: The carbon-nitrogen-oxygen cycle
A) operates at a slightly
Q27: Convection is important in stars because it
A)
Q27: In the proton-proton chain
A)no neutrinos are produced.
B)energy
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