2016 March 18 day
"What is the biggest thing a person can actually see and make sure?"
I think that there are several ways of thinking about this question, but one answer is a huge group called "galaxies".
when you point the telescope to the starry sky of spring, you can find several gently glittering galaxies.
and careful observation, there are areas where such galaxies are densely packed.
The area where the galaxy looks densely ... These are called galaxies, galaxy clusters according to the scale.
THE PICTURE IS PART OF THE M81 GALAXY GROUP AND THE VIRGO CLUSTER. ALTHOUGH THE LARGE AND SMALL VARIETY OF LIGHT GALAXIES ARE REFLECTED, ALL CELESTIAL BODIES WITH NUMBERS ARE GALAXIES.
Even one galaxy is a huge group with masses of tens of millions of suns. Galaxies and galaxies are gathering hundreds and thousands of such galaxies in the spread of millions to tens of millions of light years. It is an unimaginable scale!
In the group, the galaxy is exercising intensely. Sometimes galaxies collide with each other, stronger one tears weaker one, absorption combination happens, it is really rich in change.
It is the point that "You can check with your own eyes" such a cosmic scale's work!
It is a really good age that ordinary people like us can easily see the phenomenon of the cosmic scale ♬
The starry sky of spring is called "Window hidden in far away far space". With the positional relationship between the Earth and the Milky Way, Spring is the season where the galaxies can be seen well.
how about going for a starry sky to challenge "the biggest thing you can see with your eyes in this universe"?
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