The age of the universe estimated in this way turns out to be just the reciprocal of the Hubble constant (that is, 1/H). This age estimate is sometimes called the Hubble time. For a Hubble constant of 20 kilometers/second per million light-years, the Hubble time is about 15 billion ...
Its half-life is 1600 years, and the estimated age of the universe is five billion years. View Solution Age of the universe is about 1010 years whereas the mankind has existed for 106 years. How many seconds would the man have existed if age of universe were one day. View Solution ...
A minimum age of the universe can be estimated directly by determining the age of the oldest objects in our Galaxy. These objects are the metal-poor stars in the halo of the Milky Way. Recent work on nucleochronology finds that the oldest stars are 15.23.7Gyr old. White dwarf cooling ...
How do they know the universe is 13.7 billion years old? The value of 13.7 billion years for the age of the universe has been estimated by using a Hubble's constant H of approximately 71 km/s/Mpc, and plugging it into the following equation: Age of the Universe = 1/H This value...
A minimum age of the universe can be estimated directly by determining the age of the oldest objects in the our Galaxy. These objects are the metal-poor stars in the halo of the Milky Way. Recent work on nucleochronology finds that the oldest stars are 15.2+/-3.7 Gyr old. White dwarf ...
There is no indication of the bump in the parent sample. The stacked spectrum of the ten selected objects, however, shows a clear depression (5σ) centred on approximately 2,175 Å. Although we did not find evidence for significant differences in stellar properties (mass or age), these...
Aminimumageoftheuniversecanbeestimateddirectlybydeterminingtheageof theoldestobjectsintheourGalaxy.Theseobjectsarethemetal-poorstarsinthe halooftheMilkyWay.Recentworkonnucleochronologyfindsthattheoldeststars are15.2±3.7Gyrold.Whitedwarfcoolingcurveshavefoundaminimumagefor ...
What is the size of small microbes? View Solution What is the size of particulate ? View Solution What is the size of particulate ? View Solution Why is radium still found in nature? Its half-life is 1600 years, and the estimated age of the universe is five billion years. View Solutio...
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The average timescale required for formation of a Boltzmann brain is vastly greater than the current age of the Universe. 一个玻尔兹曼大脑的形成所需的平均时标大大地大于宇宙现在的年龄。 LASER-wikipedia2 This puts the estimated age range for the cluster at 14.2 ± 1.2 billion years, or rou...