Enter the amount to be converted in the box to the left of the currency and press the convert button. To show Bangladeshi Taka and just one other currency click on any other currency. The Bangladeshi Taka is the currency in Bangladesh (BD, BGD). The symbol for BDT can be written Tk.
Mass, Size, and Density of the Universe. The mass density of visible matter (i.e., galaxies) in the Universe is estimated at 3e-28 kg/m^3 (3e-31 times the mass density of water). The radius of the visible Universe is estimated at 1.7e26 m (18 thousand million lightyears) plus or minus 20 percent or so.
Physical properties. The total mass of the hydrosphere is about 1.4 quintillion metric tons (7018140000000000000â 1.4Ã1018 long tons or 7018150000000000000â 1.5Ã1018 short tons), which is about 0.023% of Earth's total mass. Less than 3% is freshwater; the rest is saltwater, almost all of which is in the ocean.