Cosmological time scale 1 | Scale of the universe | Cosmology & Astronomy | Khan Academy

in #specialize8 years ago

Cosmological time scale 1 | Scale of the universe | Cosmology & Astronomy | Khan Academy

Coin Marketplace

STEEM 0.12
TRX 0.34
JST 0.032
BTC 112772.08
ETH 4188.29
USDT 1.00
SBD 0.84