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Zhirayr Ghazarosyan

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very well, only big bang will be then, and not in the beginning was big bang, sorry that I rude, and the years is not your grandfather's property to give billions years left-right.

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Development of Massive Elliptical Galaxies

This graphic shows the evolutionary sequence in the growth of massive elliptical galaxies over 13 billion years, as gleaned from space-based and ground-based telescopic observations. The growth of this class of galaxies is quickly driven by rapid star formation and mergers with other galaxies.

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Credits: NASA/ESA/Niels Bohr Institute/STScI

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Star Gazers episode for Dec. 28th 2015 -Jan. 3rd, 2016

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Sombrero Galaxy 

Spitzer found that halo around the Sombrero Galaxy is larger and more massive than previously thought, indicative of a giant elliptical galaxy . The galaxy has an apparent magnitude of + 9.0, making it easily visible with amateur telescope, and it's considered by some authors to be the brightest galaxy within of 10 megaparsecs of the Milky Way. The large bulge, the central supermassive black hole, and the dust lane all attract the attention of professional astronomers 

Credit , ESO Telescope, European Space Agency 

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Not So Random

Gamma ray bursts (GRBs) are brief, intense bursts of gamma rays.  They were first detected in the 1960s as part of a project to observe nuclear weapons tests ( Since then we’ve been able to observe lots of gamma ray bursts, as they occur at a rate of about once a day.  We aren’t entirely sure what causes them. One idea is that they occur when a hypergiant star collapses into a black hole. If that were the case, then we would likely see bursts come from random directions (if they originate from outside our galaxy) or along the galactic plane (if they originate in our own galaxy). But now a new study has shown that neither is the case.

The results are being published in the Astrophysical Journal Letters. What the team did was to analyze the direction of high energy GRBs over a five year period. During that time 72 ultra high energy GRBs were detected, and 19 of them were clustered in a small region of sky near the Big Dipper. You can see this clustering in the image below.  This region of sky is not part of the galactic plane, but it is in the direction of the Virgo supercluster, of which the Milky Way is a part.

So it seems that the most energetic gamma ray bursts are clustered in the same way that nearby galaxies are clustered. This suggests that they may be powered by active black holes in the centers of galaxies.

Image: Kazumasa Kawata

Paper:  R.U. Abbasi, et al. Indications of Intermediate-Scale Anisotropy of Cosmic Rays with Energy Greater Than 57 EeV in the Northern Sky Measured with the Surface Detector of the Telescope Array Experiment. arXiv:1404.5890 [astro-ph.HE]

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Jeremiah 1

The Call of Jeremiah

4 The word of the Lord came to me, saying,

5 “Before I formed you in the womb I knew you,
    before you were born I set you apart;
    I appointed you as a prophet to the nations.”
6 “Alas, Sovereign Lord,” I said, “I do not know how to speak; I am too young.”

7 But the Lord said to me, “Do not say, ‘I am too young.’ You must go to everyone I send you to and say whatever I command you. 8 Do not be afraid of them, for I am with you and will rescue you,” declares the Lord.

9 Then the Lord reached out his hand and touched my mouth and said to me, “I have put my words in your mouth. 10 See, today I appoint you over nations and kingdoms to uproot and tear down, to destroy and overthrow, to build and to plant.”

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