Universe
Discover the latest trends in Universe.
Extragalactic Explained: Life Beyond Our Galaxy
What does 'extragalactic' mean? Explore the science of everything that exists beyond the Milky Way, from nearby galaxies to distant quasars.
Exoplanets: Worlds Beyond Our Sun
Discover exoplanets—planets orbiting stars beyond our sun. Learn why these distant worlds are a hot topic in space exploration and the search for life.
Event Horizon: The Point of No Return
Discover the event horizon, a black hole's point of no return. Learn what it is, why it's a hot topic, and its implications for physics.
Escape Velocity Explained
What is escape velocity? Discover the speed needed to break free from a planet's gravity and why it's essential for all space exploration.
Eris: The Distant Dwarf Planet
Discover Eris, the distant dwarf planet whose discovery challenged our definition of a planet and led to Pluto's reclassification.
Equinox Explained: Earth's Celestial Balance
Discover the equinox, the twice-yearly event when day and night are nearly equal, marking the start of spring and autumn. Learn why it happens.
Enceladus: Saturn's Icy Ocean Moon
Discover Enceladus, Saturn's icy moon with a subsurface ocean and geysers that hint at the potential for extraterrestrial life.
Elliptical Galaxies Explained
Discover elliptical galaxies, the smooth, oval-shaped star cities that hold clues to the universe's history and evolution. Learn why they matter.
The Electromagnetic Spectrum Explained
Explore the full range of light, from radio waves to gamma rays. Learn how the electromagnetic spectrum shapes our technology and view of the cosmos.
Electromagnetic Radiation Explained
Discover electromagnetic radiation, the energy waves that include everything from radio waves to gamma rays, and how they shape our universe and technology.