Skip to main content alibris logo
A Text-Book of Astronomy - Comstock, George C
Filter Results
Item Condition
Seller Rating
Other Options
Change Currency

Excerpt: ...of the individual spots were large enough to contain the earth if it had been dropped upon them. From Fig. 67 determine in miles the length of the group on August 14th. Fig. 71 shows an enlarged view of these spots as they appeared on August 17th, and in this we find some details not so well shown in the preceding pictures. The larger spots consist of a black part called the nucleus or umbra (Latin, shadow), which is surrounded by an irregular border called the penumbra (partial shadow), which is intermediate in ...

loading
A Text-Book of Astronomy 2020, Independently Published

ISBN-13: 9798555936981

Trade paperback

A Text-Book of Astronomy 2018, Outlook Verlag

ISBN-13: 9783734034985

Trade paperback

A Text-Book of Astronomy 2018, Franklin Classics Trade Press

ISBN-13: 9780344890222

Trade paperback

A Text-Book of Astronomy 2018, Franklin Classics Trade Press

ISBN-13: 9780344890239

Hardcover

A Text-Book of Astronomy 2018, Outlook Verlag

ISBN-13: 9783734034992

Hardcover

A Text-Book of Astronomy 2018, Franklin Classics

ISBN-13: 9780342846474

Trade paperback

A Text-Book of Astronomy 2018, Franklin Classics

ISBN-13: 9780342846481

Hardcover

A Text-Book of Astronomy 2017, Createspace Independent Publishing Platform

ISBN-13: 9781544286334

Trade paperback

A Text-Book of Astronomy 2017, Andesite Press

ISBN-13: 9781375989220

Trade paperback

A Text-Book of Astronomy 2015, Andesite Press

ISBN-13: 9781296515737

Hardcover

A Text-Book of Astronomy 2014, Createspace Independent Publishing Platform

ISBN-13: 9781502379467

Trade paperback