What role did Percival Lowell play that led to the discovery and ...

[leo leo]

What role did Percival Lowell play that led to the discovery and naming of Pluto?
 
  What will be an ideal response?

Question 2

Although theory says a massive black hole with an accretion disk should be emitting X-rays, many black holes emit
 
  A) mainly in the gamma.
  B) virtually no radiation at all.
  C) only in the visible.
  D) equally across the entire electromagnetic spectrum.
  E) mostly in the infrared.

[dellikani2015]

Answer to Question 1

He predicted the existence of Planet X and its position, and began the search for it at his observatory before his death. When Clyde Tombaugh found it while continuing the search at Lowell Observatory, Pluto was close to the position Lowell had expected, but this turned out to be just luck.

Answer to Question 2

E

[leo leo]

TYSM

[Zebsrer]

Excellent