Statements (26)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
gptkb:cloud_service
|
| gptkbp:alsoKnownAs |
gptkb:night_shining_clouds
|
| gptkbp:color |
blue
silver white |
| gptkbp:composedOf |
water ice crystals
|
| gptkbp:discoveredIn |
1885
|
| gptkbp:elevation |
76 to 85 kilometers
|
| gptkbp:firstObserved |
gptkb:Europe
|
| gptkbp:formWhen |
water vapor freezes around dust particles
|
| gptkbp:hasViewOf |
summer months
high latitudes |
| https://www.w3.org/2000/01/rdf-schema#label |
Noctilucent clouds
|
| gptkbp:locatedIn |
mesosphere
|
| gptkbp:notableFor |
highest clouds in Earth's atmosphere
visible only in deep twilight |
| gptkbp:relatedTo |
gptkb:polar_mesospheric_clouds
climate change |
| gptkbp:seasonalOccurrence |
less common in southern hemisphere
more common in northern hemisphere |
| gptkbp:studiedBy |
satellites
ground-based observers |
| gptkbp:visibleAfter |
sunset
|
| gptkbp:visibleBefore |
sunrise
|
| gptkbp:bfsParent |
gptkb:Night_Sky
|
| gptkbp:bfsLayer |
7
|