The Universe Quiz

Mercury is the closest planet to the sun. It orbits the sun at an average distance of about 36 million miles, which is much closer than Earth's average distance of about 93 million miles. This proximity to the sun also means that Mercury has a shorter year, completing one orbit in just 88 Earth days. Additionally, Mercury has a very thin atmosphere and extreme temperature variations, ranging from extremely hot during the day to extremely cold at night.

Pluto is no longer considered a planet because of a reclassification by the International Astronomical Union (IAU) in 2006. According to the new definition, a planet must meet three criteria: it must orbit the Sun, it must be spherical in shape, and it must have cleared its orbit of other debris. While Pluto orbits the Sun and is spherical, it has not cleared its orbit, as it shares its path with other objects in the Kuiper Belt. Therefore, it is now classified as a "dwarf planet" rather than a full-fledged planet.

The correct answer is 8. There are eight planets in the Solar System.

The correct answer is Yottameters. Yottameter is the largest unit of measurement used for measuring galaxies. It is equal to one quadrillion kilometers or one trillion astronomical units. Given the vast size of galaxies, it is necessary to use such a large unit of measurement to accurately quantify their distances.

The given statement "Virgo A is the biggest galaxy" is false. The biggest galaxy known to date is IC 1101, which is located in the Abell 2029 galaxy cluster. Virgo A, also known as Messier 87, is a massive galaxy, but it is not the biggest.

IC 1101 is the correct answer because it is known to be the largest galaxy in the observable universe. It is located approximately 1.04 billion light-years away from Earth and has an estimated diameter of about 6 million light-years. IC 1101 is classified as a supergiant elliptical galaxy and is believed to contain trillions of stars. Its immense size and mass make it a fascinating object of study for astronomers and astrophysicists.

The largest planet in the observable universe is probably an enormous exoplanet known as ROXs 42 Bb. Discovered in 2013, this gas giant is located about 500 light-years away from Earth. NASA estimates that ROXs 42 Bb has a radius approximately 1.12 times that of Jupiter's.

The correct answer is Ixion, Orcus, Pluto, and Sedna. These are all considered dwarf planets in our solar system. Mars is not a dwarf planet, but a regular planet. TReS-4 is not a dwarf planet either, but rather an exoplanet discovered outside of our solar system.

VY Canis Majoris is the correct answer because it is currently known as one of the biggest stars in the universe. It is a red hypergiant star located in the constellation Canis Major and has a radius of approximately 3,000,000,000 km. This makes it one of the largest known stars, much bigger than our Sun which has a radius of about 1,000,000 km.

A Yottameter is a unit of length in the metric system. It is equal to 1,000,000,000,000,000,000,000,000 meters. This is an extremely large distance, representing one sextillion meters. It is used to measure astronomical distances or the size of the universe.