Which of these statements is correct?
A. Black hole is an astronomical unit that cannot be seen by telescope.
B. A black hole is a celestial object whose gravitational field is so strong that nothing, including light, can escape its pull.
C. Only A
D. Both A and B are correct
Answer:D
Which of these statements is correct?
A. Black hole is an astronomical unit that cannot be seen by telescope. B. A black hole is a celestial object whose gravitational field is so strong that nothing, including light, can escape its pull. C. Only A D. Both A and B are correct