Question No. 1
What does PACE stand for in the context of NASA's satellite mission?
A
Plankton, Aerosol, Cloud, and Environment
B
Plankton, Aerosol, Cloud, and Ocean Ecosystem
C
Plankton, Air quality, Cloud, and Ecosystems
D
Pollution, Aerosol, Cloud, and Earth
Question No. 2
What is Sagittarius A* traditionally considered to be?
A
A dark matter concentration
C
A supermassive black hole
Question No. 3
What new model is proposed as an alternative to the black hole explanation for Sagittarius A*?
B
A dense dark matter core
Question No. 4
What is a key implication if Sagittarius A* is indeed a dark matter core?
A
It confirms traditional black hole theories
B
It suggests stars do not orbit it
C
It may change our understanding of galaxy structures
D
It implies there is no gravitational effect