the surface area of the 8m (201 m^2) telescope is 1/4 that of the 16m (804 m^2) telescope A=(Pi)r^2
The Milky Way [See Link] is the galaxy which is the home of our Solar System together with at least 200 billion other stars It is a barred spiral galaxy that is part of the Local Group of galaxies. It is one of billions of galaxies in the observable universe.
A comet's tail points away from the sun. Sometimes the dust and gas separate, though, because they are driven by two different effects, radiation pressure and solar wind, respectively. Both point mostly away from the sun, but not always exactly. Photographs of Comet Hale-Bopp show this effect well, for example, the Astronomy Picture of the Day at the link shown. A comet in deepest cold space is generally thought of as a giant dirty snowball with the snow made of water ice, and frozen organic liquids, and the dirt of small rocks and dust which are the debris of explosions and collisions of different bodies in space. It is only when the comet approaches the sun and warms up that surface ice melts and vapourises carrying dust with it and forming a large cloud that we can see clearly. It is at this stage when the effects mentioned above act on the cloud and sweep it behind the comet relative to the sun to form a tail or tails, and because there is no atmospheric air in space the tail always points away from the sun even when the comet is travelling away from it.
The core of the sun is 15 million oK (Kelvin is the scientific scale) and the corona is 5800 oK. The corona is that temperature because sound waves produce intense heat and below the corona and photosphere are convection currents that bring heat to the surface.
The age of the universe is about 13.73 billion years +/- 120 million years from Big Bang to the present. Older texts might cite values ranging from 8 to 20 billion years, but recent astronomical data have made these estimates obsolete. Mathematical modeling and high-precision astronomical observations are in line with the currently offered figures. Certainly there will be other opinions, but they are not science-based ones.
The age of the universe is not known, because we don't know what happened "before" the cosmic inflation episode often called "The Big Bang". There are, of course, religious statements about the age of the universe that sharply differ from the scientifically determined value. Religious doctrines vary from 6000 years (for "Young Earth Creationism") to 155 trillion years (for some Hindu beliefs).
Links to related questions and to relevant posts are provided.Their has been some studies and the estimate age of the universe is13.798 ± 0.037 billion years to the present. This was judged by thePlanckspace telescope. The Planck space telescope was launched in 2009 and to-date has been mapping the sky, examining so-called "light" fossils and sound echoes from the Big Bang by looking at background radiation in the cosmos. The spacecraft is expected to keep transmitting data until late 2013, when it runs out of cooling fluid.
The age of the universe is 13.8 billions years old. 50 bumillion