Sky and Telescope April 1973 Ira Sprague Bowen Pioneer 10 Eta Carinae Nebula NF
$ 4.23
Description
Sky and Telescope April 1973 Ira Sprague Bowen Pioneer 10 Eta Carinae Nebula NF. Special Feature : Eta Carinae Nebula. Cover : Objective-Prism Photograph of the Field of Eta Carinae. Ira Sprague Bowen (1898-1973). Very Good: A general well read issue that has been taken care of and not misused. Grading Standards Magazines Pristine: An issue that looks like it has never been read. Perfect condition. As it would be were it a new issue on a newsstand. Mint: A pristine issue with a mailing label. A perfect issue containing a flaw from the manufacturer or distributor. i.e.- a mis-cut page due to folding in the presses Near Mint (Near Fine): Very few flaws of any kind. May have some minor flaws and possibly 1 or 2 moderate flaws. An issue that was carefully read and was taken care of. Color change in the paper due to its acidity is NOT a flaw. Color change due to the sun IS a flaw. Very Good: A general well read issue that has been taken care of and not misused. Can have numerous flaws of both light and moderate extent and can have a few Major flaws such as creases or dog-ears. Good: Can have numerous flaws of all levels and can have tears. Fair: An issue in Good condition that is missing either the front or back cover. Poor: An issue that is missing the front, back, or both covers. May be missing interior pages. This Issue: AURA's Fabry-Perot Interferometer Ira Sprague Bowen (1898-1973) Gegenschein Observations from Pioneer 10 The Distribution of X-Ray Sources in Our Galaxy Two Puzzling Objects : OJ 287 and BL Lacertae Special Feature : Eta Carinae Nebula Cover : Objective-Prism Photograph of the Field of Eta Carinae
