![]() Solar wind has even been known to knock out power grids on Earth. These streams cause aurorae, for example the northern lights, and illuminate the tails, or comas, of comets. This is a stream of plasma or charged particles given off by the outer regions of a star, consisting mainly of free electrons and protons. Apart from the dust, debris and larger objects floating about there is also solar wind. Heavenly Bodies is a testament to the duality of sex, the twin seductiveness and horror of drug addiction, and the social, political, and personal dramas of America in the 1960. ![]() However, the scientific consensus is that they do, and since 1979 there have been many observations of the indirect evidence of their existence. In this blistering collection of lyric poems, Cynthia Huntington gives an intimate view of the sexual revolution and rebellion in a time before the rise of feminism. ![]() Theoretical because, despite being predicted to exist as far back as 1916 by Einstein, there is still no firm proof that they actually exist. They occur when the energy of a massive star is exhausted leaving no forces to counterbalance gravity, causing them to collapse until, theoretically, the object is so infinitely dense it has no volume. The name comes from the fact that these celestial objects have such immense gravitational fields that, within a certain boundary, known as the event horizon, nothing - not even light - can escape their pull. These kinds of neutron stars are called pulsars.Ī black hole is what's left behind when a particularly large star dies. The result is detectable electromagnetic radiation that seems to blink on and off as the star rotates. Some neutron stars can appear to pulsate as they eject particles that are accelerated near their magnetic poles, which differ from their rotational axis. Because of this they can have a surface gravity as much as 3 trillion times that of Earth, enough to cause the protons and electrons of the atoms within them to combine and form neutrons, hence the name. Despite having a mass of as much as double that of our sun, neutron stars typically measure no more than 20km in diameter, making them extremely dense. This tells that the Universe and the solar system are about 13.7 billion years old. When a small star, with a mass not much bigger than twice that of our own sun, eventually runs out of nuclear fuel and explodes in a supernova, it can collapse back in on itself to form a neutron star. Big Bang theory says that all heavenly bodies and systems were originated at the same time from the common lineage of matter. In an instant it all recoils, exploding dramatically, spewing out newly formed elements into space in the process. But before they do so completely the atoms at their core are brought so close together that the repulsive forces between them suddenly exceed the gravitational forces pulling them together. Because of this they can start to implode. Depending upon their size, when some stars reach the end of their lives and their nuclear fuel begins to run out, they start to lack sufficient outward forces to counter their own gravity. If stars are the universe's factories then supernovae are the delivery trucks. An artist's impression of the Nasa spacecraft Stardust crossing the path of comet Wild-2 in January 2004.
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