Hubble-classificatie: verschil tussen versies
Verwijderde inhoud Toegevoegde inhoud
k Catsort |
Add 1 book for Wikipedia:Verifieerbaarheid (20210222)) #IABot (v2.0.8) (GreenC bot |
||
Regel 38:
* {{Citeer journal |last=Hubble |first=E. P. |authorlink=Edwin Hubble |year=1926 |title=Extra-galactic nebulae |journal=Astrophysical Journal |volume=64 |pages=321–369}}
* {{Citeer journal |last=Hubble |first=E. P. |authorlink=Edwin Hubble |year=1927 |title=The Classification of Spiral Nebulae |journal=The Observatory |volume=50 |pages=276}}
* {{Citeer boek |last=Hubble |first=E. P. |authorlink=Edwin Hubble |title=The Realm of the Nebulae |url=https://archive.org/details/in.ernet.dli.2015.212163 |year=1936 |publisher=Yale University Press |location=New Haven |isbn=36018182}}
<gallery widths=300>
M101 hires STScI-PRC2006-10a.jpg|Type Scd: [[Windmolenstelsel]] Messier 101/NGC 5457, een spiraal stelsel
| |||