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Photo by: Tamasflex Creative Commons If you recently have had a conversation with an astronomer, then you’ve probably heard them mention the exit pupil as a certain eye piece in telescopes or binoculars. But what does exit pupil really mean, and how can it affect views when looking through a telescope?
Ever wonder why this colorless, odorless, tasteless non-toxic gas is named strong>Helium? The name Helium comes from a Greek word Helios meaning sun. It was in the Sun that this element was first discovered. In 1868 a French Scientist, Jules Janssen was observing a total solar eclipse. He noticed a bright yellow spectrum and thought
Interstellar Medium is matter that makes up the space between stars and star systems in a galaxy. Most people think space is a complete vacuum, making resources or matter completely absent or none at all. This is a common misconception, since space and the star systems really have matter.
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The Sun’s astrosphere is composed of several layers that include the heliosphere, heliosheath, heliopause and the termination shock. Heliosphere can be thought of as a bubble in space surrounding the sun. It shields and helps protect the earth from harmful intergalactic radiation. These radiations can destroy DNA and can make climate not suitable for existence.
Interstellar is attached to many other words, like the terms intergalactic and interplanetary. It literally means between or among stars, and is defined as an adjective in the English language. The term can also pertain to space clouds, matter in outer space or a specific study in astronomy. Interstellar cloud is a generic name for
Stars were thought to be fixed balls of light in the sky before the advent of the modern telescope. Astronomers have now discovered that some stars can change in brightness and call them variable stars.
Interferometry is a branch of radio astronomy. Under astronomy it is defined as the family or group of techniques to use superimposed or overlaid electromagnetic waves placed in a specific order to extract information regarding light, sound, or radio waves. This type of study is vital and essential in astronomy, since the way to study
It was the Astronomer Edwin Hubble that was able to describe in numerical terms at which the rate of the universe is expanding, this is known as the Hubble’s Law. In 1929, he was able to observe that almost all galaxies seemed to be moving away from the Earth. This is illustrated in mathematical terms
Photo by: S.fonsi Creative Commons Equinox literally means equal and this is the time of the year when the sun is over the equator which means that there is an equal length of time for night and day. This usually occurs twice a year, once in March and once in September. The equinox occurring in
Photo by: Pumbaa80 Creative Commons Do you know a lot about hydrogen? Did you know that it is the most abundant element? It makes up about 75% of the universe. Stars are formed from it! It is also considered to be the third most abundant element on Earth. It is present in water and all
