Andromeda Galaxy

William Herschel was not an astronomer when he discovered Uranus. He was actually a musician and teacher. He looked at the stars as a hobby. However, he used a method different than most star gazers of the time. He mapped out the stars in relation to each other, instead of the traditional grid method used at the time (Smith 2013). He started out by studying the Society papers on natural history and matter theory, after he joined the Bath Philosophical Society in 1780. He also reached out to the…

dust in outer space. A primeval is standing for the earliest ages in the history of the world. This means Primeval nebula means a cloud of gas and dust in outer space a long time ago. It was how people think the galaxy was created. This is saying that the universe was always there. The galaxy was created. Then all the stars and planets were created. They were all made from small clouds of dust and gas in space. The nebular hypothesis is the most widely used theory for the formation of the…

HR Diagrams The Hertzsprung-Russell Diagram, otherwise known as HR diagram, is a graph that shows many patterns and properties of stars based on plotting them by their temperature on the surface and their light they emit, or luminosity. Created in 1912, the HR diagram was made by two astronomers, Ejnar Hertzsprung and Henry Russell who found patterns with stars’ properties. The Hertzsprung-Russell Diagram shows how every star goes through different evolutionary stages. These evolutionary stages…

How many things can you see in the night sky? A lot! On a clear night you might see the moon, some planets, and thousands of sparkling stars. You can see even more with a telescope. You might see stars where before you only saw dark space. You might see that many stars look larger than others. You might see that some stars that look white are really red or blue. With bigger and bigger telescopes you can see more and more objects in the sky and you can see those objects in more and more detail.…

William Huggins was an amazing contribution to the rise of astronomy. When Huggins was born in Cornhill, England on February 7, 1824. A bit later in life, Huggins married Margaret Lindsey who also had an affinity for astronomy. She persuaded her husband to continue his work and together they became a dynamic duo of astronomers. Somewhere towards the middle of his life, William Huggins built an observatory on top of the roof of his own house. At this time, he lived in Tulse Hill, England. The…

In the mid 20-ies of the last century the American astronomer E. Hubble found that the distance between galaxies in the observable universe is continuously increasing, like galaxies diverge from each other. At Hubble and his colleagues began to form the impression that the many billions of years ago in our days talking about 15 - 20 billion of the universe matter was concentrated in a very small volume with a fantastically high density, many orders of magnitude superior to the density of matter…

it? The observable universe is about 90 billion light years in diameter. There are at least one hundred billion galaxies, each with one hundred to one thousand billion stars. Recently, we've learned that planets are very common too. And that there are probably trillions and trillions of habitable planets in the universe. This leads…

How old is our universe really? For years there has been a race to discover the Solar System’s true age. For thousands of years, people have thought the Solar System and everything inside it to be created only several thousand years ago. Whereas many people now days have discovered that there is a considerable amount of evidence to suspect the Solar System is actually billions of years old. Fairly recent discovers have brought to light that there is also counter evidence to disprove the billion…

While most of the radiation emitted from a "normal" galaxy is in the form of visible light, like that of the radiation of ordinary stars, AGNs are prominent across the entire electromagnetic spectrum. Thus, astronomers needed to look beyond the visual regime to see their full potential. Recent technological advancements, such as satellite deployment, have enabled astronomers to explore energies once unattainable. In addition to the showing in a wide range of energies, AGNs also change in…

Introduction Delphinus is a constellation that often passes by the watch of astronomers due to its limited size, however this little wonder has fascinating stars that captivate your attention when you take the time to focus upon it. Location South and away from the Milky Way's band lies the constellation Delphinus the Dolphin. This tiny grouping of stars lies in the transition zone from that of the summer star filled skies to that of the sparse autumn skies. Once you have located Delphinus…