So even though a supernova means a star hasdied, it also marks the birth of elements that support life.阅读短文,从每题所给的A、B、C和D四个选项中,选出最佳选项。The author is describing someoneobservingA. an asteroid(小行星)hiting a planetB. a plant thti dyingC. the Sun outshining ...
When a giant star explodes like this, it’s called a supernova.To the naked eye, a supernova appears to be a bright new star, but it’s not a new star. It’s a dying star.However, the shock waves from a supernova excite nearby clouds of hydrogen gas, causing them to compress, ...
Stars of less than eight solar masses (M☉) or so are thought to end their lives as a long-lived stellar ember called a white dwarf star. Above the limit, dying stars can become neutron stars or black holes. But before they do, these heavyweights will explode in a supernova....
A supernova is the explosion of a massive star. There are many different types of supernovae, but they can be broadly separated into two main types: thermonuclear runaway or core-collapse. This first type happens in binary star systems where at least one star is a white dwarf, and they'...
A dying supernova spotted for first timJohnson, John Jr
In 1572, Danish astronomer Tycho Brahe noticed something puzzling in the night sky: a bright, new (in Latin, nova) star that faded as quickly as it appeared. Until Brahe discovered the disappearing star (which we know today was a supernova, and not a new star but rather a dying star)...
Supernova Remnants Many nebulae are formed by asupernova: the violent explosion of a dying star. When stars explode, they cast off their outermost mantles of gas and plasma, creating clouds, rings, and plumes.New starsrise like a phoenix from the ashes of the star that came before. ...
But it was to an ordinary mindstorm as a supernova is to a hurricane, and its violence was the violence of love. It loved me, that mindstorm, and it wanted me, and its bells called to me, and sang its love, and I reached to it and touched, wanting to be with it, wanting to ...
TOVÁBBIAK Leírás After the Protostar picks up strange readings from a dying star, Dal R’El and Gwyndala race against time to save their friends, their ship, new alien species and an entire planetary system before a supernova destroys them all! When the Protostar’s malfunctioning transpor...
The guts of a dying star This visualization of a simulated supernova is helping to reveal why pulsars spin so fast. Pulsars are neutron stars that emit beams of electromagnetic rad... L Buchen - 《Nature》 被引量: 0发表: 2009年 Preface - Here and Now This is the story, or one of ...