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E-book If the Universe Is Teeming with Aliens ... WHERE IS EVERYBODY?: Sevent…
Given the fact that there are perhaps 400 billion stars in our Galaxy alone, and perhaps 400 billion galaxies in the Universe, it stands to reason that somewhere out there, in the 14-billion-year-old cosmos, there is or once was a civilization at least as advanced as our own. The sheer enormity of the numbers almost demands that we accept the truth of this hypothesis. Why, then, have we encount…
- Edisi
- -
- ISBN/ISSN
- 9783319132358
- Deskripsi Fisik
- 442 halaman, ilus.
- Judul Seri
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- No. Panggil
- 001.9 WEB i
E-book 50 Years of Solar System Exploration: Historical Perspectives
NASA’s first successful mission to another planet, Mariner 2 to Venus in 1962, marked the beginning of what NASA Chief Scientist Jim Green describes in this volume as “a spectacular era” of solar system exploration. In its first 50 years of planetary exploration, NASA sent spacecraft to fly by, orbit, land on, or rove on every planet in our solar system, as well as Earth’s Moon and seve…
- Edisi
- -
- ISBN/ISSN
- 9781626830530
- Deskripsi Fisik
- 364 halaman, ilus.
- Judul Seri
- -
- No. Panggil
- 919 NAS f
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