Statements (56)
| Predicate | Object |
|---|---|
| gptkbp:instance_of |
gptkb:Nebula_Award
|
| gptkbp:age |
approximately 8,000 years
|
| gptkbp:apparent_magnitude |
8.8
|
| gptkbp:composed_by |
hydrogen and helium
|
| gptkbp:contains |
central star
|
| gptkbp:diameter |
about 1 light-year
|
| gptkbp:discovered_by |
gptkb:Antonie_P._de_Grijs
|
| gptkbp:distance_from_earth |
approximately 2,300 light-years
|
| gptkbp:emissions_standard |
strong in H-alpha
|
| gptkbp:exhibition |
gptkb:Messier_catalog
|
| gptkbp:features |
ring structure
|
| gptkbp:has |
complex structure
multiple ionized regions a low surface brightness a bright central star |
| https://www.w3.org/2000/01/rdf-schema#label |
the Ring Nebula (M57)
|
| gptkbp:is |
visible in small telescopes
a nebula that has been imaged in various wavelengths a nebula that has been observed for centuries a subject of many scientific papers a classic example of a planetary nebula a target for deep-sky observers a popular target for amateur astronomers a prominent feature in the night sky a well-known astronomical object often included in astronomy textbooks a target for spectroscopic studies a remnant of a red giant star one of the most studied nebulae a nebula that is part of the planetary nebula phase of stellar evolution a nebula that emits light a nebula that has a complex history a nebula that has a rich history in astronomy a nebula that has a significant amount of dust a nebula that has been studied for its morphology a nebula that is a part of the cosmic landscape a nebula that is often included in star charts a nebula that shows signs of expansion a nebula with a central star that is a white dwarf a part of the Messier catalog a remnant of a dying star a source of ionized gas a source of planetary nebula research an object of interest in stellar evolution studies located near the bright star Vega often photographed in astrophotography a nebula that is often used in educational settings |
| gptkbp:is_observed_in |
gptkb:Hubble_Space_Telescope
|
| gptkbp:is_part_of |
gptkb:Milky_Way_galaxy
|
| gptkbp:is_visible_from |
gptkb:Northern_Hemisphere
|
| gptkbp:known_as |
gptkb:NGC_6720
|
| gptkbp:located_in |
gptkb:Lyra_constellation
|
| gptkbp:research |
requires telescope for viewing
|
| gptkbp:type |
gptkb:Nebula_Award
|
| gptkbp:bfsParent |
gptkb:Lyra_constellation
|
| gptkbp:bfsLayer |
6
|