Hottest Planet In The Solar System
Of all the planets in the Solar System which one is the hottest? The answer may not be what you expect. Venus is the hottest planet in the Solar System, …
Coldest Planet In The Solar System
What is the coldest planet in the Solar System? The answer may be a little surprising, but not really too much. Pluto used to be considered the coldest planet with …
How Many Planets Are There?
Before we try and answer the question of how many planets are there, we first need to know what a planet is – what is the definition of a planet? …
Closest Planet To The Sun
What is the closest planet to the Sun? Mercury – it is the closest planet to the Sun with a minimum distance of 28.5 million miles and a maximum distance …
Planets Like The Earth
We know that there are not really any planets like the Earth in our Solar System. Mars comes the closest but its atmosphere is far too thin, it is very …
Dark Energy
Dark energy is a hypothesized unknown form of energy which permeates all space in the Universe. Observations made in recent decades indicate that expansion of the Universe is accelerating at …
Dark Matter
What is dark matter? That is a question that can not really be answered at the present time; hypotheses about the nature of dark matter and what it is will …
What Is A Galaxy?
A galaxy is a gravitationally bound system of matter consisting of stars and remnants of stars, interstellar gas and dust, and dark matter as well. The word galaxy comes from …
Exoplanets
The definition of an exoplanet is a planet outside Earth’s Solar System, orbiting another star, or a rogue planet drifting aimlessly in space. These rogue planets are also known as …