Assertion: asteroid belt's asteroid | /r/HasProperty | planet
Facets:
value: at the time
type: TEMPORAL
value: in 1801
type: TEMPORAL
Source sentences:
text: Giuseppe Piazzi thought an asteroid was a planet in 1801.
text: Too small to be called planets, asteroids are rocky chunks that also orbit our sun along with the space rocks known as meteoroids.
text: There is a theory that all the asteroids were once part of a planet in ancient times.
text: Instead of there once being a single planet in this orbit that was destroyed, astronomers think that perhaps the asteroids are parts of a planet that never formed.
text: Scientists believe the asteroids are the pieces of a planet that never formed.
text: Because Olbers already had credit for discovering a planet (Pallas; at the time, the asteroids were considered to be planets), he gave the honor of naming his new discovery to German mathematician Carl Friedrich Gauss, whose orbital calculations had enabled astronomers to confirm the existence of Ceres, the first asteroid, and who had computed the orbit of the new planet in the remarkably short time of 10 hours.