An in-depth analysis of the light from these quasars using the Hubble telescope has shown that the Andromeda galaxy's "halo" has two nested gas shells, with the "inner shell" extending outward by about 500,000 light-years and the "outer shell" extending by up to 2 million light-years
Category:
Extraterrestrial
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Extraterrestrial
Will Jupiter, The 'King Of The Planets' In Our Solar System, Become a Star In The Future?
After the sun evolves into a red giant, the hydrogen in its core is almost completely fused into helium, so the nuclear fusion inside the sun stops, after which the sun loses its internal radiation pressure and continues to collapse, leading to a constant increase in temperature and pressure in its core, while the helium in the central region of the sun is gradually compressed into the condensed state.
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This satellite is the communications satellite LES-1. In the 1960s and 1970s, the United States launched several such communications satellites, from LES-1 to LES-9, which were relatively small, weighing only about 32 kg, each with a horn antenna and an x-band transponder, as well as a 237 MHz signal transmitter, which were powered mainly by solar panels
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The moon is the closest planet to the earth and the brightest and most easily observed object in the earth's night sky. Because the moon is always facing the same way towards the earth, for us humans living on earth, we can only ever observe one fixed side of the moon.
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Extraterrestrial
The Solar System Moves 7 Billion Kilometres a Year, But The North Star Is Always Due North - Why Is That?
In our universe, whether as large as a galaxy or as small as an electron, we are always in motion, and even when we think we are sitting motionless in our chairs, the earth is carrying us around the sun at a speed of about 30 kilometres per second, and the sun is also in motion, in fact it is carrying the entire solar system around the centre of the milky way, and at a speed of about 220 kilometres per second.
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Extraterrestrial
Nasa Finds Junk On Mars When It's Clearly Empty: A Shiny Piece Of Metal Embedded Between Rocks
So far, we have not found any trace of life on Mars. No one knows whether there is life on Mars. However, when we are exploring Mars, sometimes we will see some interesting scenes, even some garbage. It is strange that there is no one on Mars. Why is there garbage? Where does this rubbish come from?
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Extraterrestrial
Curiosity Discovers Surreal Phenomenon: Cool Rocks 'Growing' On Desolate Mars, Defying Gravity
In the photos returned from the rover, we see Mars as a desolate world without a trace of life. Although Mars looks desolate and dry, there are many people who believe that Mars may become a second home for us humans
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Extraterrestrial
Is The Sun Suspended In The Universe? What Exists Above And Below The Solar System?
Below the solar system, there is a star system labeled "alpha Centauri".
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Extraterrestrial
Second Home Just Around The Corner? Probe Finds 'Reservoir', Nasa: Send People Up There By 2040
In our solar system, there are 2 planets in the habitable zone of the solar system, one of which is our home planet Earth, and the other is Mars
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Extraterrestrial
Why Is It That The Discovery Of Extraterrestrial Life In Our Solar System Would Be The Beginning Of Despair For Humanity?
How exactly did such a complex life emerge on Earth? This is a great mystery to modern humans, but we are almost certain that the "birth of life" is a process that has a very small probability of occurring.