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[9] [15] This future visibility limit is calculated at a comoving distance of 19 billion parsecs (62 billion light-years), assuming the universe will keep expanding forever, which implies the number of galaxies that can ever be theoretically observed in the infinite future is only larger than the number currently observable by a factor of 2.36 ...
The mass of the oceans is approximately 1.35 × 10 18 metric tons or about 1/4400 of Earth's total mass. The oceans cover an area of 361.8 million km 2 (139.7 million sq mi) with a mean depth of 3,682 m (12,080 ft), resulting in an estimated volume of 1.332 billion km 3 (320 million cu mi). [194]
1.3 billion Eukaryotic life dies out on Earth due to carbon dioxide starvation. Only prokaryotes remain. [81] 1.5 billion Callisto is captured into the mean-motion resonance of the other Galilean moons of Jupiter, completing the 1:2:4:8 chain. (Currently only Io, Europa and Ganymede participate in the 1:2:4 resonance.) [91] 1.5–1.6 billion
(1 000 000 000 000 000; 1000 5; short scale: one quadrillion; long scale: one thousand billion, or one billiard) ISO: peta- (P) Biology – Insects : 1,000,000,000,000,000 to 10,000,000,000,000,000 (10 15 to 10 16 ) – The estimated total number of ants on Earth alive at any one time (their biomass is approximately equal to the total biomass ...
In the case of Earth this includes all space from the Earth to a distance of roughly 1% of the mean distance from Earth to the Sun, [116] or 1.5 million km (0.93 million mi). Beyond Earth's Hill sphere extends along Earth's orbital path its orbital and co-orbital space.
So to understand how we came to exist on planet Earth, we'll need to know how Earth managed to stay fit for life for billions of years. Earth has been habitable for billions of years ...
The orbital distance of Earth will increase to at most 150% of its current value (that is, 1.5 AU (220 million km; 140 million mi)). [ 17 ] The most rapid part of the Sun's expansion into a red giant will occur during the final stages, when the Sun will be about 12 billion years old.
For most people, it's hard to imagine having even a million dollars, let a billion. However, fortunes totaling $1 billion -- and much, much more -- are a reality for the richest people in the...