"A smile of friendship is a baring of the teeth. So is a snarl of menace. It can be fatal to mistake the latter for the former."
"Harm an alien being only under circumstances of self-defense."
TRUST NO ALIEN BEING UNDER ANY CIRCUMSTANCES.
--From "Exploration Ship's Handbook"
The problem of separating the friends from the enemies was a major one in the conquest of space, as many a dead spacer could have testified. A tough job when you could see an alien and judge appearances; far tougher when they were only whispers on the wind.
Comet Street Kids reading books follow the adventures of Rav, Asha, Tess and Finn, four of the residents of Comet Street. There are 72 exciting stories in the series that children won't be able to put down. There's a sandpit in the playground at the Comet Street flats, and everyone wants to get in! But is the little pit big enough for Asha, Rav, Tess and Finn? Reading age: 4-5 years
The purpose of this book is to give a detailed description of the planetary nebulae including the relevant astronomical observations and their interpretation. Considerable attention is given to the evolution of these objects as well as to their physical characteristics. I t is hoped that the book be useful to both advanced research workers and to students with some background in astronomy. In this regard, the book should serve as a text as well as a reference work. The many tables included are expected to be useful for both purposes. The references are generally not included in the text except for historical purposes in an effort to improve readability. References are given at the end of each chapter together with sufficient text to describe their content. No attempt has been made to make the list of references complete; on the contrary it has generally been limited to the most recent literature on the subject which in turn refers to earlier research. Again, exceptions have been made for references of historical interest.
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