Assertion: comet | /r/HasProperty | faint to be visible
Facets:
Source sentences:
text: Most comets are too faint to be visible without the aid of a telescope, but a few each decade become bright enough to be visible to the naked eye.
text: Most comets are too faint to be visible without the aid of a telescope, but a few each decade become bright enough to be visible to the naked eye.
text: Most comets are too faint to be visible without the aid of a telescope, but a few each decade become bright enough to be visible to the naked eye.
text: Most comets are too faint to be visible without the aid of a telescope, but a few each decade become bright enough to be visible to the naked eye.
text: Most comets are too faint to be visible without the aid of a telescope, but a few each decade become bright enough to be visible to the naked eye.