It contains four globular clusters, with the brightest of them – NGC 6715 (M54) – being known well before the discovery of the galaxy itself in 1994. Dwarf galaxies are the smallest of all the observed galactic structures, sometimes as small as just 5,000 stars -- compared to the Milky Way's estimated 200 to 400 billion stars. The Sagittarius Dwarf Spheroidal Galaxy (Sgr dSph), also known as the Sagittarius Dwarf Elliptical Galaxy (Sgr dE or Sag DEG), is an elliptical loop-shaped satellite galaxy of the Milky Way. Finding such a large group of satellites near the Magellanic Clouds was surprising, though, as earlier surveys of the southern sky found very little, so we were not expecting to stumble on such treasure.". However, the researchers originally assumed the dwarf galaxy had been pulled towards the Milky Way through a so-called "tidal merger". "The Virgo Radial Merger opens the door to greater understanding of other phenomena that we see and don't fully understand, and that could very well have been affected by something having fallen right through the middle of the galaxy less than three billion years ago.". However compared to other dwarf galaxies orbiting the Milky Way, Ant 2 is truly enormous - about a third of the size of the Milky Way itself. New Dwarf Galaxies Near Milky Way By: Monica Young March 19, 2015 6 Astronomers have found a set of possible dwarf galaxies near our galaxy, a discovery crucial to understanding dark matter. A dwarf galaxy is a small galaxy composed of about 1000 up to several billion stars, as compared to the Milky Way's 200–400 billion stars. Nine dwarf satellites, including three tiny galaxies, in orbit around our home galaxy were spotted by astronomers at the University of Cambridge in the skies of the southern hemisphere. It could send our solar system 'Flying into Space'. READ MORE: NASA collects rare ‘treacherous’ asteroid Bennu sample. Artist's concept of the four tails of the Sagittarius dwarf galaxy (orange clump on left of the image) orbiting the Milky Way. A New Dwarf Galaxy This image maps dwarf galaxy candidates near the Milky Way (red and blue), not including Crater 2. "Dwarf satellites are the final frontier for testing our theories of dark matter," said study co-author Dr Vasily Belokurov of the Institute of Astronomy. This new discovery—a collaboration between researchers at Penn, Rensselaer Polytechnic Institute, and Queen’s University—is the first evidence of a “shell structure” in the Milky Way Streams. The farthest and brightest, 1.2 million light-years away in the constellation Eridanus, is right on the edge of the Milky Way and is on the verge of being pulled in. The Large Magellanic Cloud, which closely orbits the Milky Way and contains over 30 billion stars, is sometimes classified as a dwarf galaxy; others consider it a full-fledged galaxy. Discovered in newly released imaging data from the Dark Energy Survey, the find consists of three confirmed dwarf galaxies and six objects that could be either be dwarf galaxies or globular clusters -- the difference being that the stars in globular clusters are not held together with dark matter. Their findings were described in the October 20 issue of The Astrophysical Journal. The galaxy, called Crater 2, is around 391,000 light years away from our solar system and appears to be part of a family of dwarf galaxies that may eventually merge with the Milky Way. The Large and Small Magellanic clouds were thought to be the closest galaxies to ours, until 1994, when the Sagittarius Dwarf Elliptical Galaxy (SagDEG) was discovered. The largest in terms of breadth is the Sagittarius dwarf, discovered in 1994 – but it’s big only because our galaxy’s gravity is ripping it apart. the Canis... Characteristics:. ALL RIGHTS RESERVED. The Sagittarius Dwarf Spheroidal Galaxy is currently in the process of being consumed by the Milky Way and is expected to pass through it within the next 100 million years.
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