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  2. Googol - Wikipedia

    en.wikipedia.org/wiki/Googol

    To put in perspective the size of a googol, the mass of an electron, just under 10 −30 kg, can be compared to the mass of the visible universe, estimated at between 10 50 and 10 60 kg. [5] It is a ratio in the order of about 10 80 to 10 90, or at most one ten-billionth of a googol (0.00000001% of a googol).

  3. Googolplex - Wikipedia

    en.wikipedia.org/wiki/Googolplex

    Therefore, it requires 10 94 such books to print all the zeros of a googolplex (that is, printing a googol zeros). [4] If each book had a mass of 100 grams, all of them would have a total mass of 10 93 kilograms. In comparison, Earth's mass is 5.97 × 10 24 kilograms, [5] the mass of the Milky Way galaxy is estimated at 1.8 × 10 42 kilograms ...

  4. Cartography of Africa - Wikipedia

    en.wikipedia.org/wiki/Cartography_of_Africa

    The Fra Mauro map of 1459 shows a more detailed picture of Africa as a continent, including the Cape of Diab at its southernmost point, reflecting an expedition of 1420. Sebastian Münster 's Cosmographia (1545) labels the Cape of Good Hope , reached by Bartolomeu Dias in 1488, as caput bonae spei .

  5. List of kingdoms and empires in African history - Wikipedia

    en.wikipedia.org/wiki/List_of_kingdoms_and...

    There were many kingdoms and empires in all regions of the continent of Africa throughout history. A kingdom is a state with a king or queen as its head. [1] An empire is a political unit made up of several territories, military outposts, and peoples, "usually created by conquest, and divided between a dominant centre and subordinate peripheries".

  6. 1,000,000,000 - Wikipedia

    en.wikipedia.org/wiki/1,000,000,000

    (10 9 days is roughly 2.738 million years.) About 10 9 months ago, dinosaurs walked the Earth during the late Cretaceous. (10 9 months is roughly 83.3 million years.) About 10 9 years—a gigaannus—ago, the first multicellular eukaryotes appeared on Earth. About 10 9 decades ago, the thin disk of the Milky Way started to form. (10 9 decades ...

  7. History of large numbers - Wikipedia

    en.wikipedia.org/wiki/History_of_large_numbers

    For example, the Panchavimsha Brahmana lists 10 9 as nikharva, 10 10 vâdava, 10 11 akṣiti, while Śâṅkhyâyana Śrauta Sûtra has 10 9 nikharva, 10 10 samudra, 10 11 salila, 10 12 antya, 10 13 ananta. Such lists of names for powers of ten are called daśaguṇottarra saṁjñâ. There area also analogous lists of Sanskrit names for ...

  8. New Map Simulates 220 Million Years of Star Formation - AOL

    www.aol.com/news/map-simulates-220-million-years...

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  9. Geologic time scale - Wikipedia

    en.wikipedia.org/wiki/Geologic_time_scale

    A megaannus (Ma) represents one million (10 6) years. The geologic time scale or geological time scale ( GTS ) is a representation of time based on the rock record of Earth . It is a system of chronological dating that uses chronostratigraphy (the process of relating strata to time) and geochronology (a scientific branch of geology that aims to ...