Final answer:
Planets are not rare in the Milky Way; analyses of data suggest that small terrestrial planets and super Earths are common, with at least 50 billion planets in the galaxy.
Step-by-step explanation:
The statement that planets are very rare in the Milky Way is false. Analyses of Kepler data have shown that planets, including small terrestrial ones and super Earths, are fairly common.
In fact, it's estimated that about one quarter of stars host exoplanet systems, which, within our own galaxy, suggests the existence of at least 50 billion planets. Furthermore, the discovery of exoplanets in varying sizes supports the idea that earthlike planets may number in the billions in the Milky Way alone. So, the prevalence of planets in our galaxy is now understood to be much more common than once thought.