Coldest Natural Place of the Known Universe

      Boomerang Nebula or Bow Tie Nebula is defined the coldest natural place of the known universe. It is in the Centaurus constellation and 5000 light years away from the Earth. The background temperature of empty space is 2.7 K, the Boomerang Nebula is even colder than that. Its temperature is measured 1 K or −272.15 °C which is hardly above the coldest temperature possible- 0 K or absolute zero. Boomerang Nebula is a dying red giant that's spewing out a cloud of dust and gas. It expanding lot of gas outward from the star at a rate of 164 Km per second that is  about 10 times faster than similar space objects. Its temperature was measured by the comparison of radiation signals of vast empty stretches of space with signals from carbon mono oxide gas particles in it.

                                                          Pic courtesy: www.wikipedia.org

 
  The Boomerang Nebula was first observed by an Australian Astronomers team in 1980. In the late 90's the nebula was observed by Hubble Space Telescope and in 2013 astronomer took a closer look of the nebula's shape by using the ALMA.
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 Multiverse-The Parallel Universe does it even Exist?

Is it possible that we live in a Multiverse? What is Multiverse?

   The Multiverse or Meta Universe is a hypothetical set of various possible Universes. The miscellaneous distinct universes with in the Multiverse are called the "Parallel Universe"
The idea that Multiverse exist started with the Big Bang. An unknown trigger caused the singularity do expanded flit in the space. The cannot be proven and cannot be disproven either. If it does exist then there will be thousands of copies of ourselves. In fact all possible mathematical structures exist as their own separate universes.

                                                 Pic courtesy: www.wikipedia.org

There are 4 Multiverses we might be living in
1. The Inflationary Multiverse: when universe is pop-up like bubble in the ocean, each new bubble universe is created during rapid period of expansion is called Inflation. In this universes gravity could be weak and electromagnetism is different.
2. The Quilted Multiverse: It is not just big it is truly infinite so infinite that we can search through infinite space, infinite galaxies with infinite stars. If someone is flying in this universe he can never escape from Quilted universe.
3. The Quantum Multiverse: Quantum mechanics rules the behavior of small particles like electron as it moves along where exactly it is we can take a picture of its positions and where it is moving we can determined by its different positions of picture. Quantum Multiverse hypothesis take a particle down have to decide by its post pictures. Each of those possibilities with live in its own universe. Any time when we take a picture or observe anything actually we split the universe.
4.The Brane Multiverse: We live in three special dimension. There could be other brain of other universes which is different in dimension from our brain. A three dimensional book has many two dimensional pages but our multiverse book is ten dimensional and our universe is like three dimensional pages.

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 What is Zodiac?

 A Constellation is a group of stars that are considered to form imaginary outlines and meaningful patterns on the celestial sphere. The 88 modern constellations are defined regions of the sky together covering the entire celestial sphere.

In between them 12 constellations are called Zodiac. The plane in which the Earth orbits the Sun is called the ecliptic. The ecliptic intersects at the middle point of the celestial sphere. The circle of the ecliptic is divided by 12 equal parts. Zodiac are located in the belt of this intersection. The Zodiac circle traditionally starts on the spring equinox. So the Sun moving into the Pisces constellation marks the beginning of the Zodiac circle. During the year the Sun enters all 12 constellations. And the end of the Zodiac circle is in the Aquarius constellation.

                                                 Pic courtesy: www.wikipedia.org

A total of 360° angle is covered by 12 equal angle of 12 constellations.
1.Aries-The Ram-0°
2.Taurus-The Bull-30°
3.Gemini-The Twins-60°
4.Cancer-The Crab-90°
5.Leo-The Lion-120°
6.Virgo-The Maiden-150°
7.Libra-The Scales-180°
8.Scorpio-The Scorpion-210°
9.Sagittarius-The Archer-240°
10.Capricorn-The Sea-Goat-270°
11.Aquarius-The Water-Bearer-300°
12.Pisces-The Fish-330°
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Dark Matter & Dark Energy:The Greatest Mystery in the Universe


Matter as we know it Atoms, Stars and Galaxies, Planets, Rocks and Dust. This matter account less than 5% of the known universe, about 25% is Dark Matter and 70% is Dark Energy both of which are invisible. The gravity of the visible matter is not enough to form Galaxies and complex structures. Stars would more lightly be scattered all over the place and not form galaxies. So there is something else inside and around them. Something doesn't emit or reflect light. Places with the high concentration dark matter bend light passing nearby so there is something interacts with gravity. Dark matter is not Antimatter because Antimatter produces unique Gamma rays. Dark matter is also not made up a black holes, very compact objects that violent the effect their surroundings while Dark matter seems to be scattered all over the place. Dark matter is probably made up with complicated exotic particles that doesn't interact with light and matter.

                                                        Pic courtesy: www.wikipedia.org                                                                                           
Dark Energy is even more strange and mysterious we can't detect it we can't measure it. In 1929 Edwin Hubble examined how the wave length of the light emitted by distant galaxies shifts towards the red end of the electromagnetic spectrum as it travel through space. He determined that this was because the Universe itself is expanding. The red shifted because the wave length of the light stressed as the Universe expanse. The expansion of the Universe is accelerating. Space doesn't change its properties as it expanse. Galaxies are tied bound together by gravity so we don't experience the expansion in our daily life. Empty space of the Universe is forming more in every second. So dark energy seems some kind of energy intrinsic to empty space. Energy that stronger than anything else we know and keeps getting stronger time passes by.

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What Will Happen if a Traveler Travels in the Space with the Speed of Light?

According to time dilation formula


where Δt is the time interval between two co-local events 
             Δt′ is the time interval between those same events
            v is the velocity of the traveler 
            c is the velocity of light

If traveler travels with the closer velocities to light then v→c i.e. v/c →1
then the approximate value of v/c should be 0.9, 0.99,0 .999, 0.9999, 0.99999......

Now if the traveler travels in the space for 5 years
then, 
         Δt′=11.62 years when v=0.9 i.e. the time is equal to 11.62 years in the Earth
Δt′ =35.46 years when v=0.99 i.e. the time is equal to 35.46 years in the Earth
and so on

Now, if the traveler travels with the same speed of light then v/c=1 and Δt′=∞
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