Home > Terms > English, UK (UE) > Nectarian

Nectarian

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 Nectarian system extends from 3. 9 billion to 3. 85 billion years ago.

This is auto-generated content. You can help to improve it.
0
Improve it
More
Collect to Blossary

Other Languages:

More

Member comments

You have to log in to post to discussions.

Related terms

Pre-Nectarian
Astronomy; Planetary science

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, ...

evening star
Astronomy; Planetary science

A planet, not a star, that can be seen in the west just after sunset and it is usually Venus or Mercury.

simple sugar molecule
Astronomy; Planetary science

Also called glycolaldehyde, the simple sugar molecule is composed of carbon, hydrogen and oxygen and plays a key role in the chemical reaction that forms ribonucleic acid (RNA), a ...

Saturn
Astronomy; Planetary science

A planet that is sixth in distance from the Sun and is the second largest planet in the Solar System.

Goddard
Astronomy; Planetary science

American scientist who was one of the first people to proposed that rockets could be used to travel into space.

interplanetary
Astronomy; Planetary science

Existing or happening between planets. A satellite that is launched from the Earth to orbit Mercury travels through interplanetary space.

Jupiter
Astronomy; Planetary science

The planet that is fifth in distance from Sun. It is the largest planet in the Solar System.

Terms in the News

Featured Terms

Harry8L
  • 0

    Terms

  • 0

    Blossaries

  • 1

    Followers

Industry/Domain: History Category: World history

Lhasa

Capital of Tibet since the 9th century. Originally it had little political significance but was of great religious importance. In 1642 it became the ...

Contributor

Featured blossaries

Screening Out Loud: ENG 195 Film

Category: Entertainment   1 18 Terms

Architecture

Category: Arts   3 1 Terms

Browers Terms By Category

TERMS

SOCIAL

EXTRAS

SOLUTIONS