|
gptkbp:instance_of
|
gptkb:Nebula_Award
|
|
gptkbp:age
|
approximately 1,500 years
|
|
gptkbp:apparent_magnitude
|
8.8
|
|
gptkbp:associated_with
|
stellar evolution
|
|
gptkbp:body_shape
|
ring-like
|
|
gptkbp:coloration
|
blue-green
|
|
gptkbp:composed_by
|
hydrogen and helium
hydrogen, helium, and carbon
|
|
gptkbp:contains
|
central star
|
|
gptkbp:contains_star
|
gptkb:NGC_6720
|
|
gptkbp:declination
|
+30° 42′ 30″
|
|
gptkbp:discovered_by
|
gptkb:Antonie_van_Leeuwenhoek
Antonie P. de Grassi
|
|
gptkbp:distance_from_earth
|
approximately 2,000 light years
|
|
gptkbp:emissions_standard
|
H-alpha
|
|
gptkbp:exhibition
|
gptkb:NGC_6720
|
|
gptkbp:expansion_plans
|
20 km/s
|
|
gptkbp:features
|
complex structure
bright outer shell
faint inner region
|
|
gptkbp:has_function
|
shell structure
bipolar outflow
central star remnant
|
|
gptkbp:has_radius
|
about 1 light year
about 0.5 light years
|
|
gptkbp:has_spectral_type
|
O-type star
|
|
https://www.w3.org/2000/01/rdf-schema#label
|
Ring Nebula
|
|
gptkbp:image
|
1887
1880s
|
|
gptkbp:ingredients
|
ionized gas
|
|
gptkbp:is
|
a planetary nebula
|
|
gptkbp:is_analyzed_in
|
gptkb:spectroscopy
|
|
gptkbp:is_associated_with
|
the death of a star
|
|
gptkbp:is_considered_as
|
a classic example of a planetary nebula
|
|
gptkbp:is_considered_to_be
|
a remnant of a red giant star
|
|
gptkbp:is_explored_in
|
gptkb:space_mission
|
|
gptkbp:is_featured_in
|
astronomy textbooks
|
|
gptkbp:is_known_for
|
gptkb:its_beauty
|
|
gptkbp:is_located_in
|
the Lyra constellation
|
|
gptkbp:is_located_near
|
gptkb:Epsilon_Lyrae
|
|
gptkbp:is_notable_for
|
its ring shape
|
|
gptkbp:is_observed_in
|
gptkb:Hubble_Space_Telescope
extensive
various wavelengths
|
|
gptkbp:is_often_compared_to
|
other planetary nebulae
|
|
gptkbp:is_often_described_as
|
a cosmic jewel
|
|
gptkbp:is_part_of
|
gptkb:Hubble_Heritage_Project
gptkb:Milky_Way_galaxy
popular culture references
NGC catalog
|
|
gptkbp:is_popular_in
|
amateur astronomy
|
|
gptkbp:is_similar_to
|
gptkb:Dumbbell_Nebula
|
|
gptkbp:is_studied_for
|
stellar lifecycle
|
|
gptkbp:is_studied_in
|
astrophysics
|
|
gptkbp:is_used_in
|
educational outreach
|
|
gptkbp:is_visible_from
|
gptkb:Earth
northern hemisphere
small telescopes
|
|
gptkbp:known_as
|
gptkb:NGC_6720
|
|
gptkbp:located_in
|
gptkb:Lyra_constellation
constellation Lyra
|
|
gptkbp:notable_feature
|
bright outer shell
faint inner region
|
|
gptkbp:part_of
|
gptkb:Milky_Way_galaxy
|
|
gptkbp:photography
|
professional astronomers
|
|
gptkbp:photometric_type
|
gptkb:Nebula_Award
|
|
gptkbp:research
|
requires telescope
notable for amateur astronomy
|
|
gptkbp:right_ascension
|
18h 53m 35.0s
|
|
gptkbp:surrounding_material
|
ejected stellar material
|
|
gptkbp:type
|
gptkb:Nebula_Award
gptkb:Planetary_Nebula
|
|
gptkbp:bfsParent
|
gptkb:Lyra
gptkb:Planetary_Nebula
|
|
gptkbp:bfsLayer
|
5
|