References

Why is Polaris called the North Star and how is it used?

Reference Travel through time to see the best Doctor Who villains faced by the Timelord over the show's near-60 year span.

A red giant star is a dying star in the last stages of stellar evolution. Our own sun will turn into a red giant, expand and engulf the inner planets — possibly even Earth.

Reference There are three theories as to how Earth's satellite could have been created.

Earth moves around the sun and across the universe on its axis and at an incredible rate.

Reference Earth's star is the largest and the most massive object in the solar system. More than one million Earths could fit inside the sun.

Earth's distance from the sun does not stay the same throughout the year.

The speed of light puts a speed limit on matter, lets us peer back into the history of our universe, and has deep implications for physics and space travel.

Reference The sun's temperature varies from around 27 million degrees Fahrenheit (15 million degrees Celsius) in the core to about 10,000 degrees F (5,500 degrees C) at the surface.

Reference Neil Armstrong was a NASA astronaut, aeronautical engineer and the first person to walk on the moon, on July 20, 1969.

String theory might be the theory of everything… or a flawed framework for theoretical physics.

Reference This list of famous astronomers includes great scientists in history who mastered many fields and modern astronomers who helped popularize astronomy.

Feature We have a look at the upcoming sci-fi movies for 2022 to see what we've got to look forward to.

Reference Scientists have found nearly 5,000 exoplanets since the first such world was confirmed orbiting a sunlike star in 1995. These ones are most similar to Earth.

Reference How long it takes to get to Mars depends on several factors including planetary position and available technology.

Voyager 1, which launched in 1977, is farther from Earth than any other spacecraft.

The Guardians of the Galaxy ships pack quite a bit of history and interesting trivia, and have quickly become Hollywood icons thanks to the MCU.

Reference The universe was born with the Big Bang as an unimaginably hot, dense point. SPACE.com offers an overview of the universe and its history, age and structure.