砂時計星雲 (Japanese Wikipedia)

Analysis of information sources in references of the Wikipedia article "砂時計星雲" in Japanese language version.

refsWebsite

Global rank Japanese rank

1,342^nd place

415^th place

6,632^nd place

5,628^th place

low place

987^th place

1^st place

1,592^nd place

3,926^th place

arizona.edu

"Hubble Finds an Hourglass Nebula around a Dying Star" (Press release). HabbleSite. 16 January 1996. 2015年1月10日閲覧。

“SIMBAD Astronomical Database”. Results for ENGRAVED HOURGLASS NEBULA. 2015年1月10日閲覧。
“SIMBAD Astronomical Database”. Results for HOURGLASS NEBULA. 2015年1月10日閲覧。