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.
NASA. Mass also has an effect on the overall geometry of the universe. The density of matter and energy in the universe determines whether the universe is open, closed, or flat. If the density is equal to the critical density, then the universe has zero curvature; it is flat. You can imagine a flat universe like a sheet of paper that extends infinitely in all directions.