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.
The void is an illusion. The universe is certainly not empty, that's a fact, but its not very dense either. Today, the visible universe consists mostly of empty space, void, while ordinary matter accounts for only 4 percent of the total mass. So where is the rest of 95 percent of the universe's mass? In dark energy and dark matter, according to some physical theories. Further still, the void doesn't seem to be so empty after all, but filled with an ocean of elementary sub-atomic and weakly interacting particles.