"המכתש הזה בן מיליארד שנים."

Translation:This crater is a billion years old.

August 10, 2016

1 Comment


https://www.duolingo.com/Tom273734

You can read something about the age of the lunar craters, e.g., here https://www.sciencedirect.com/science/article/abs/pii/S0019103513001322 . Note the time units used there: 1 Ga (giga-annum) = billion years, 1 Myr = million of years.

March 10, 2019
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