Ailsa Harvey

Reference Scientists have found more than 5,000 exoplanets since the first such world was confirmed orbiting a sunlike star in 1995. We explore the ones most similar to Earth.

Reference The wormhole theory postulates that a theoretical passage through space-time could create shortcuts for long journeys across the universe.

Reference You are time-traveling right now, but how does real time travel differ to that of science fiction? Here, we explore some of the theories behind time travel and the science that supports time-bending.

Reference Sirius has been the shiniest star in the sky for a long, long time.

Reference Uranus is the seventh planet from the sun and was the first to be discovered with a telescope. We explore this ice giant in more detail here.

Reference Earth is the only planet known to support life. Learn about what Earth is made of and where it came from.

Reference Artemis is NASA's plan to go back to the moon.

Reference We GPS all the time but how does it work and why was it invented? Here we explore this vital space-based technology.

Reference Albert Einstein profoundly changed physics and ideas about space and time. Learn more about his life, theories and scientific impact.

Reference Learn how stars form, how stars and constellations are named, what happens when stars like our sun evolve, and ultimately, die.

Reference Heliocentrism places the sun at the center of the Solar System. This is the history of how scientists discovered our place and in the Solar System.

Reference The V2 rocket was the world's first liquid-propellant rocket. After claiming thousands of lives, how did it become a revolutionary breakthrough in rocket technology?

Reference This gas giant is the largest planet in the solar system, but just how big is Jupiter?

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.

Reference Cosmology by definition is the branch of astronomy involving the origin and evolution of the universe, from the Big Bang to the future of the cosmos.

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

Reference Exactly how many stars are in the universe is impossible to know because we aren't sure of its scale.