科学家认为,宇宙产生于距今约137亿年前的“大爆炸”。紧接着“大爆炸”后的宇宙温度极高,物质粒子全部以离子化形式存在。所以,恒星和星系这种致密的物质结构无法轻易形成。随着宇宙的膨胀、冷却和去离子化,很多原子核和电子结合在一起,形成了氢和氦这种中性的、原子量小的原子。虽然恒星随后开始形成,但由于宇宙处于去离子化状态,光很难在其中传播,因此,这些恒星几乎不会闪烁发光。研究显示,距今约130亿年至125亿年间,宇 Scientists believe the universe was created in the “big bang” about 13.7 billion years ago. Immediately after the “Big Bang ” after the universe temperature is extremely high, all the material particles exist in ionized form. Therefore, the dense matter structure of stars and galaxies can not be easily formed. As the universe expands, cools and deionizes, many nuclei and electrons combine to form neutral, small-atom atoms such as hydrogen and helium. Although the stars began to form later, the light was hard to spread in the universe due to the de-ionization of the universe, so the stars hardly glittered. Studies show that about 130 to 125 billion years ago, Yu