Statements (18)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
spectral line
|
| gptkbp:alsoKnownAs |
hydrogen line
|
| gptkbp:causedBy |
hyperfine transition
|
| gptkbp:detects |
radio telescopes
|
| gptkbp:discoveredBy |
gptkb:Harold_Ewen
|
| gptkbp:discoveredIn |
1951
|
| gptkbp:emits |
neutral hydrogen clouds
|
| gptkbp:frequency |
1420.40575177 MHz
|
| https://www.w3.org/2000/01/rdf-schema#label |
21-centimeter line
|
| gptkbp:importantFor |
mapping galactic structure
studying interstellar medium |
| gptkbp:originatedIn |
neutral hydrogen atom
|
| gptkbp:usedFor |
determine redshifts of galaxies
measure galactic rotation curves |
| gptkbp:usedIn |
radio astronomy
|
| gptkbp:wavelengthRange |
21.106 centimeters
|
| gptkbp:bfsParent |
gptkb:HI_line
|
| gptkbp:bfsLayer |
7
|