Matter – Matter is all that has mass in it. Mass can neither be created or can be destroyed, according to the Law of Conservation of mass. Matter can be transferred from one form to another. Interesting fact is that, normal matter accounts for only 4% of the entire universe!
Any star with a mass less than seven times our Sun is expected to end it’s life as a small, dim star known as a white dwarf. When a dying star puffs off most of its material and collapses, it becomes extremely small, dense, and hot. The matter in a white dwarf is so densely packed that a teaspoonful of the material would weigh several tonnes.
^END OF A STAR Our Sun will end its life as a white dwarf like this star, in about seven billion years from now.
Some stars, known as brown dwarfs, are so small and cool that they are unable to start up nuclear reactions in their core or to burn hydrogen. They are often described as “failed stars”. Brown dwarfs do shine, but very faintly, because they produce a little heat as they slowly shrink due to gravity.
^TWIN BROWN DWARFS This artwork shows the dimmest star-like bodies known, called 2M 0939.
Mums appear in Chinese writings in 15th century BC – they used to call it chu. It is first mentioned in Japan around 8th century AD. The single petal variety was adopted as crest and seal of the emperor. It first appeared in the western world around 17th century. In 1753, Swedish Botanist Karl Linnaeus joined two Greek words, chrysos (meaning gold) and anthemon (meaning flower) to coin chrysanthemum.
I greatly apologize that I was unable to post a Random Word from astronomy on Monday, due to my busy week. I will take care of this from next time. Thank you.
Is emptiness real? Is space really empty? Or their are some properties which prove that space isn’t just empty?
According to Albert Einstein, space isn’t just a two dimensional thing, space is real stretchable thing, which comprises of both space and time, which then becomes spacetime.
Space has 4 dimensions, as we are all aware of. 1d, 2d, 3d and 4d. [They are also termed as 0d, 1d, 2d and 3d].
According to Einstein, space isn’t really empty. And that is scientifically proven as well. Space has 3 hydrogen atoms per cubic cm. That means space is not empty, but we can’t see those atoms in the gaps.
Vacuum of space is also not empty. It contains virtual particles which come to existence and then pop into nothing again.
One of my close colleagues named Brains had debated with me on this topic a while ago. We can’t come to any conclusion, as our views differ in many scenarios.
But that was a healthy debate on how the gaps in the space are filled with matter. We still not really know the truth behind this, but astronomers are working very well on this topic. We might know more on this in very near future.
Thanks for reading this post.
Magnetars – They are the most magnetic objects in the entire universe. They are just a kind of a Neutron star. They are rare. Only 10-12% of all neutron stars are born as Magnetars. They are so magnetic that they can even rip off your credit card trillions of Kms away.
This image of the elliptical radio galaxy M87, taken with the Hubble Space Telescope, reveals a brilliant jet of high-speed electrons sent out from the nucleus. The jet is produced by a black hole with the mass of three billion Suns.
Now you see it [Light] – Light travels through space at 300,000 kilometers a second (186,000 miles a second). At this speed light waves could travel around the world seven times in a single second.