Assertion: black hole | /r/HasProperty | invisible
Facets:
value: to the eye
type: TRANSITIVE-OBJECT
value: literally
type: MANNER
value: by nature
type: OTHER
value: by definition
type: OTHER
value: themselves
type: MANNER
value: essentially
type: DEGREE
value: for the first time
type: TEMPORAL
value: in infrared
type: LOCATION
value: nearly
type: DEGREE
Source sentences:
text: Black hole is invisible.
text: Now, for the first time, the black hole is visible, real to us in a way that, when I saw it first take form on the computer screen 10 months ago, knocked me back on my heels.
text: Again, nothing can escape a black hole — not visible light, X-rays, infrared light, microwaves or any other form of radiation.
text: For this reason black holes are invisible to the eye, as lightless as the empty, dark space surrounding them.
text: Although the black holes are invisible (they cannot be seen), some of the matter that is falling into them is very bright.
text: Because light cannot escape the Event Horizon, black holes are literally invisible to human eyes.
text: A black hole is practically invisible
text: Because black holes are invisible, astronomers try to locate them by observing their effects.
text: By definition, black holes are invisible.
text: The black hole is the brightest single-source radio wave emitter in the galaxy, but in infrared it is nearly invisible.
text: But consider this: Black holes by their very nature are invisible.
text: While black holes are invisible by nature, the ultra-hot material swirling in their midst forms a ring of light around the perimeter that reveals the mouth of the object itself based on its silhouette.
text: While black holes are invisible by nature, the ultra-hot material swirling in their midst forms a ring of light around the perimeter that reveals the mouth of the object itself based on its silhouette.
text: Although the black holes are invisible (they cannot be seen), some of the matter that is falling into them is very bright.
text: By definition, black holes are invisible, because no light escapes from them.
text: Black holes are invisible and people cannot see them.
text: Although the black holes are invisible (they cannot be seen), some of the matter that is falling into them is very bright.
text: But if black holes are invisible, how could we ever find one?
text: It seems like they should be invisible.
text: Black holes are invisible to the naked eye, have no locally detectable features, and even light can’t escape them.
text: Black holes are essentially invisible, but astronomers are developing technology to image the immediate surroundings of these enigmas like never before.
text: While black holes, themselves, are invisible, their presence exerts a powerful gravitational force on nearby gas and stars, causing everything to orbit at tremendous speeds.
text: So, even though a black hole is invisible, its accretion disk makes it presence observationally evident.