What is planet ? yashwanth blog.

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  A planet is a large object such as Venus or Earth that orbits a star. Planets are smaller than stars, and they do not produce light. Jupiter is the biggest planet in the Solar System. Planets are shaped like a slightly squashed ball (called a spheroid). Objects that orbit planets are called satellites. There are more planets than stars in our galaxy. The current count orbiting our star: eight. The inner, rocky planets are Mercury, Venus, Earth and Mars. The earth has conditions that support life . It is neither too hot nor too cold. It has both water and air, which are both indispensable for life . Presence of oxygen in the air in an appropriate proportion supports life .
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What is galaxy? yashwanth blog.


 A galaxy is a huge collection of gas, dust, and billions of stars and their solar systems, all held together by gravity. ... It's a small part of the Milky Way Galaxy. A galaxy is a huge collection of gas, dust, and billions of stars and their solar systems. A galaxy is held together by gravity.
The best estimate from a 1999 study set that number at about 125 billion galaxies, and a 2013 study indicated that there are 225 billion galaxies in the observable universe. In 2016, that number was upped to 2 trillion, in large part because a new analysis included all the tiny, fluffy galaxies in the early universe.

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