The actual spatial size of the universe is unknown. However, by measuring the observable universe, the current size of the universe is approximately 95 billion light-years in diameter. Humanity once believed that the night sky was the unilluminated sphere that enclosed Earth when the Sun was slee...
Now, if I had a pile of the wood the size of the whole Sun, and somehow enough oxygen to burn it, it would only take about That's a long time, but it's not long enough to sustain life on Earth. => 现在,如果我有一堆与整个太阳一样大小的木头,并且有足够的氧气来燃烧它,那只会花...
Does it occur to you that maybe there's some deeper guidance than keep your mouth shut that maybe a friend might value concern over glibness? That maybe…… Maybe I'm going through something that I need to have an actual conversation about? 不,只是“假设说”,你是否想过,除了沉默不语,你...
THE UNIVERSE (NOT ACTUAL SIZE); Scientists Unveil Road Map from Here to Eternity
) and an energy density of0.25 eV/cm3(or4.005×10-14J/m3; 400–500 photons/cm3). The CMB can be seen in all directions at a distance of roughly 13.8 billion light years, but estimates of its actual distance place it at about 46 billion light years from the center of the Universe. ...
the demon in the snow the demonstration of the dentists the denturion-hard le the denver post the department in cha the dependency the depressed immune the desertification a the design and actual the design and analys the design and implem the design and implem the design and implem the design...
the origin of species the original scarab o the original size the original town the origins of the in the origins of totali the ostrich gourmet the other driver must the other saturday the other selective c the other tests condu the others the others of thinkin the others the otherwise drear...
In the same way that you know what the brightness of a candle is while you hold it in front of you, it will gradually appear dimmer the farther it is from you. By measuring the difference in actual and perceived brightness, the distance between you and the candle can be determined. ...
晚上下起瓢泼硫酸雨 or a hurricane two timesthe size of Earth lasting 300 years? 或地球个头 2 倍的飓风持续 300 年 又当如何呢? This is not the stuffof a science fiction movie. 这不是科幻电影里的题材 These are actual weather reportsfrom around the universe... 这些都是宇宙间的天气预报 ...
A:I don't think we had any surprises about the actual surface of the moon -- about the barrenness. We had looked at pictures of our landing site taken by previous missions. We had worked with models that were made from those pictures. We knew the general configuration of where the crate...