Mars 1 Flashcards
Who drew pictures of mars?
Giovanni Schiaparelli in 19th century
What were canals on mars thought to be?
Martians attempt to irrigate the planet from melting polar caps
Why do people believe theres a civilisation on Mars?
Face on mars and pyramid pictures by NASA
What is the martian meteorite?
ALH 84001 meteorite found in 1984
4.5 billion years old
What was found on the martian meteorite?
Structures considered to be fossilised remains of bacteria-like lifeforms
This was ruled out in 2005 to earthly biology but then this ruled out in 2009
How did ALH 84001 show evidence of Martian water?
Layered sequences of Ca-Mg-Fe carbonates
Maybe from hot martian water
What have the minerals found on the meteorite been linked to?
Carbonates found in hydrothermal fluids similar to volcanic vents on earth
What did electron microscope study reveal on the meteorite?
Elliptical, rope-like structures that could be fossil bacteria
How are these bacteria the same as early-earth one?
Same size, shape and structure.
Why did it take long to find out about martian origin of ALH 84001?
Was preserved for study from its discovering in 1984
Findings were only possible with new technology
What was the 2009 analysis of ALH 84001?
Ruled out Earthly and non-biological orgins
How many meteorites have been identified to match martian chemistry?
12
How much older is ALH 84001 than the other martian metoerites?
3x as old
What is the Zagami Meteorite?
18kg meteorite than impacted in 1962 in Nigera
How did the Zagami meteorite show its from Mars?
trapped air bubbles matched the composition of gasses in mars atmosphere
