ANSWERS: 7
  • Nougat?
  • If I can resist the chocolate cravings long enough to answer...there is a region of titanic energy called a "star nursery" where new stars are generated. Not all survive to find their way out to the edge as our sun has.
  • I was also going to say nougat - but instead, I looked it up for you. I'm not much into astronomy, so it doesn't all make sense to me... but hopefully it will be of some help to you. ---------------------------------- From: http://cassfos02.ucsd.edu/public/tutorial/MW.html "What lies at the center of our Galaxy? Again, dust obscures the visible light from us and we must use radio and infrared observations to elicit the nuclear properties of the Galaxy. A census shows us that the Galactic Center region is an unusually crowded place, even in this visible-light Map of Central region. At radio wavelengths, where we can peer down to the very center, we see the complex strctures shown in the 1-meter wavelength radio map made by NRL astronomers which is shown below. The map shows a region about 2000 light-years on a side; the center of the Milky Way coincides with the source marked Sag A (or Sagittarius A), which is actually three sources, a yound supernova remnant on the east side, an unusual ionized hydrogen region on the west side, and a very compact source called Sagittarius A* at the very center. ... Although there is no lack of fascinating questions about the Galactic Center, recent interest has been focused on the question of the possibility that a massive black hole exists at the center of the central star cluster. The presence of very high velocities in the stars and gas near the center of the galaxy has suggested to astronomers for a long time that a massive black hole might be present, providing a strong enough gravitational pull to keep the stars and gas in orbit. Andrea Ghez, a professor at UCLA, used the Keck 10-meter telescope at infrared wavelengths to measure the velocities of 20 stars that lie close to the galactic center over a three-year period. She found the stars are orbiting at speeds up to 1000 km/s (3 million miles per hour)! Observation done by scientists at the Max-Planck Institut in Germany have confirmed these results. This large gravitational acceleration requires an object with a mass 2.5 million times that of our Sun. The stars are located near Sagittarius A*, the radio source lying near the center of the galaxy. From its radio signal alone, Sgr A* did not have to be particularly massive, since its emission is not very powerful. Using the VLBA (Very Long Baseline Array) radio telescope, astronomers studied the motion of Sgr A*; they found a velocity of less than 20 km/sec for Sgr A* itself. This means it is very unlikely that Sgr A* is a single star or group of stars. Only a very massive object could remain stationary under the conditions exisiting at the center of the galaxy. The evidence is mounting that Sag A* is indeed a black hole of 2-3 million times the mass of the sun. Astronomers speculate that the Black Hole is being "fed" by gas from the molecular ring, or supernova remnant. By consuming less than about 1% of the mass of a star each year, releasing gravitational potential energy, Sag A* can easily account for the high-energy phenomena near the galactic center." ---------------------------------------------
  • A black hole.
  • ive recently seen a documentry about black holes huge amounts of gravity being pulled into a singularity that is so powerful light cannot even escape and it said there is a black hole at the centre of most galaxies including the milky way it feeds on matter swirling it into a galaxy then lies dormant which is how galaxies form our solar system is on the edge of one of the spiral arms of the milky way.
  • "Scientists hypothesize that a supermassive black hole lies in the Galactic Center of the Milky Way, and most (if not all) other galaxies." Source and further information: http://en.wikipedia.org/wiki/Galactic_center
  • 8-18-2017 Occasionally someone will say that a black hole is hypothesized, but most astronomers will insist they are an observed fact, even though by definition they can not be observed. You just have to hold on to the basic truths and demand that science be based on observations. Anything not based on observations is not science: it is fiction.

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