terrestrial: 

an inhabitant of the earth, especially a human being.

Aerospace: 

the branch of technology and industry concerned with both aviation and space flight.

stereochemistry: 

1. the branch of chemistry concerned with the three-dimensional arrangement of atoms and molecules and the effect of this on chemical reactions.

Geology:

the science that deals with the earth's physical structure and substance, its history, and the processes that act on it.

Paleontology:

the branch of science concerned with fossil animals and plants.

Hydrography: 

the science of surveying and charting bodies of water, such as seas, lakes, and rivers.

Astronomy:

1. the branch of science which deals with celestial objects, space, and the physical universe as a whole.

Astronautics:

1. the science and technology of human space travel and exploration.

Meteorology: 

the branch of science concerned with the processes and phenomena of the atmosphere, especially as a means of forecasting the weather.

Physics: 

the branch of science concerned with the nature and properties of matter and energy. The subject matter of physics, distinguished from that of chemistry and biology, includes mechanics, heat, light and other radiation, sound, electricity, magnetism, and the structure of atoms.

Spacecraft:

A spacecraft is a vehicle or machine designed to fly in outer space. A type of artificial satellite, spacecraft are used for a variety of purposes, including communications, Earth observation, meteorology, navigation, space colonization, planetary exploration, and transportation of humans and cargo.

Extraterrestrial: 

from outside the earth or its atmosphere.

Physiography:

The subfield of geography that studies physical patterns and processes of the Earth. It aims to understand the forces that produce and change rocks, oceans, weather, and global flora and fauna patterns.

Geoscience:

Geoscientists study the physical aspects of the Earth, such as its composition, structure, and processes, to learn about its past, present, and future.

Bacteria: 

single-celled organisms that can cause disease

Avalanche: 

a slide of large masses of snow, ice and mud down a mountain

Biosphere: 

the regions of the Earth where living organisms exist

Carbon Dioxide:

a heavy odorless colorless gas formed during respiration and by the decomposition of organic substances; absorbed from the air by plants in photosynthesis

Climate:

the weather in some location averaged over a period of time

Altostratus:

a stratus cloud at an intermediate altitude of 2 or 3 miles