![](/template/termwiki/images/likesmall.jpg)
Home > Terms > Serbo Croatian (SH) > Prenektarski period
Prenektarski period
The geologic history of Earth's Moon has been divided into five broad time periods, or systems. From oldest to youngest, these are pre-Nectarian, Nectarian, Imbrian, Eratosthenian, and Copernican. These systems are defined by the number of impact craters on the ground surface (more craters = older surface) correlated to the absolute ages determined for the lunar rock samples returned to Earth by the U. S. Apollo missions and unpiloted Soviet Luna missions. The pre-Nectarian system extends from 4. 5 billion to 3. 9 billion years ago.
0
0
Patobulinti
- Kalbos dalis: noun
- Sinonimai:
- Blossary:
- Pramonės šaka / sritis: Astronomy
- Category: Planetary science
- Company: PSRD
- Produktas / gaminys:
- Akronimas / santrumpa:
Kitos kalbos:
Ką norite pasakyti?
Terms in the News
Featured Terms
Talkininkas
Featured blossaries
farooq92
0
Terms
47
Aiškinamieji žodynai
3
Followers
World's best chocolate
Kategorija: Food 1
9 Terms
![](/template/termwiki/images/likesmall.jpg)
![](https://accounts.termwiki.com/thumb1.php?f=74bf32ba-1399957667.jpg&width=304&height=180)
farooq92
0
Terms
47
Aiškinamieji žodynai
3
Followers
Famous Architects
Kategorija: Engineering 3
9 Terms
![](/template/termwiki/images/likesmall.jpg)
![](https://accounts.termwiki.com/thumb1.php?f=2706bd90-1414212858.jpeg&width=304&height=180)
Browers Terms By Category
- Advertising(244)
- Event(2)
Marketing(246) Terms
- SSL certificates(48)
- Wireless telecommunications(3)
Wireless technologies(51) Terms
- Gardening(1753)
- Outdoor decorations(23)
- Patio & lawn(6)
- Gardening devices(6)
- BBQ(1)
- Gardening supplies(1)
Garden(1790) Terms
- General law(5868)
- Contracts(640)
- Patent & trademark(449)
- Legal(214)
- US law(77)
- European law(75)