File:Ina hrp219a.jpg

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摘要

描述Ina hrp219a.jpg	English: The unique lunar feature Ina (center), within Lacus Felicitatis, on the moon. The feature was often called the 'D-Caldera' prior to formal naming in 1979. This is Figure 232 of Apollo Over the Moon (NASA SP-362, 1978), which has the following caption: The steep-walled but shallow D-shaped depression near the center of the photograph is apparently a unique feature. It is located in a patch of mare on the foothills of the Montes Haemus, west of Mare Serenitatis. Measured along its straight side, the depression is about 3 km wide. It is situated atop a very gentle circular dome that appears to be somewhat smoother than the surrounding mare surface. As is more clearly shown in the accompanying stereogram (fig. 233), the many bulbous structures on the floor give it a blisterlike appearance. The depression is believed to be volcanic, probably a caldera (El-Baz, 1973b). Figure 234 explains the probable sequence of events leading to the formation of this unusual structure.-F.E.-B.
日期	original 1972, published 1978
來源	Transferred from en.wikipedia to Commons. (Original text: Apollo 17 Metric camera image AS17-M-1672, cropped to show Ina and surrounding terrain. Immediate source: NASA History Program Office, Apollo Over the Moon, A view from orbit (NASA SP-362, 1978) Figure 228 hrp219)
作者	NASA

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日期/時間	尺寸	用戶	備⁠註
2014-04-02 04:18	700×724× (104920 bytes)	Jstuby	{{Information \|Description = The unique lunar feature Ina (center), within [[Lacus Felicitatis]], on the moon. The feature was often called the 'D-Caldera' prior to [http://planetarynames.wr.usgs.gov/Feature/2680 formal naming in 1979]. This is Figur...

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	日期/時間	縮⁠圖	尺寸	用戶	備⁠註
目前	2016年9月12日 (一) 00:29		2,320 × 2,316（1.3 MB）	Jstuby	higher resolution http://wms.lroc.asu.edu/apollo/view?camera=M&image_name=AS17-M-1672
	2016年3月16日 (三) 01:58		700 × 724（102 KB）	FastilyClone	Transferred from enwp

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JPEG 檔案備註	This is a virtual print of Apollo Photograph AS17-M-1672 generated by the School of Earth and Space Exploration, Arizona State University. Usage of this image is governed by the Acceptable Use Policy, which can be accessed at http://apollo.sese.asu.edu/ABOUT_SCANS/index.html