Space
The Most Earth-Like Worlds Found So Far
A clear look at six Earth-like exoplanets, from TRAPPIST-1e to TOI-700 d, and why each raises questions about life beyond Earth.
What The 2024 Asteroid Warning Actually Revealed About Earth's Defenses
A newly found asteroid briefly threatened Earth in 2032. Here's what the 2024 warning taught us about detection, tracking, and stopping a real impact.
Is The Universe Infinite?
Is the universe infinite? Explore what scientists know about the size of the cosmos, the observable universe, and one of astronomy's biggest mysteries.
Water-Rich Atmosphere On Exoplanet Is Likely Methane
New research suggests the water-rich atmosphere reported on exoplanet K2-18b may actually be dominated by methane, reshaping our understanding of the distant world.
Which Planet Spins the Slowest?
Discover why Venus is the slowest-spinning planet in the Solar System, taking 243 Earth days to complete a single rotation on its axis.
What The Centaur Chariklo's Rings Reveal About The Outer Solar System
Chariklo is the smallest known object with a ring system. Learn how its icy rings are reshaping scientists' understanding of collisions, moon formation, and the outer Solar System.
Why Jupiter Is Called A Failed Star
Why is Jupiter called a failed star? Learn how the solar system’s largest planet formed, why it never ignited nuclear fusion, and what separates planets from stars.
Is Titan Bigger Than Earth?
Titan is the second largest moon in the Solar System.
What Is The Earth's Atmosphere Made Of?
The atmosphere is everything above the Earth’s surface, reaching 10,000 km into space. Everything beyond this distance is considered to be outer space.
Which Planet Has The Strongest Magnetic Field?
Mercury has a weak magnetic field, while Mars and Venus have no measurable magnetic fields. Jupiter is the largest planet and has the strongest magnetic field.
Who Invented the Telescope?
Who really invented the telescope? Explore the competing claims, from Dutch spectacle makers to Galileo’s breakthroughs that changed astronomy forever.
What are the Terrestrial Planets Of Our Solar System?
The terrestrial planets of the Solar System are those that are composed mainly of silicate rocks or metals.
Are There Volcanoes On Other Planets?
Most planets in the Solar System have evidence of active, dormant, or extinct volcanoes.
How Fast Is The Earth Moving?
The Earth is currently spinning about its axis while also orbiting the sun. Earth also orbits the Milky Way’s center as well being carried by the Milky Way.
Halley's Comet
Discover the story of Halley’s Comet, the famous celestial visitor that returns roughly every 76 years and has fascinated observers for centuries.
Will Humans Ever Go To Mars?
NASA plans on sending the first humans to Mars sometime in the late 2030s to early 2040s, yet that timeframe is dependent on funding and technology.
What Is The Karman Line?
The Karman Line is an imaginary line used by scientists to define the boundary between Earth's atmosphere and outer space.
What Are the Closest Galaxies to Earth?
Explore the galaxies closest to Earth, from the Milky Way’s satellite companions to nearby spiral neighbors in our corner of the universe.
The Four Forces Of Physics
The universe is governed by four forces of physics: gravity, electromagnetism, weak nuclear force, and strong nuclear force.
Which Planet Spins the Fastest?
Which planet spins the fastest? Discover the surprising world with the shortest day in our solar system and what makes its rapid rotation possible.
Biggest Asteroid Impacts In Earth's History
Escape for a long weekend with seven ideal Mid-Atlantic destinations offering historic downtowns, coastal scenery, mountain escapes, and easy 3-day itineraries.
What Is The Sun Made Of?
The Sun is a roughly 4.6-billion-year-old ball of plasma made mostly of hydrogen and helium.
Where Does Outer Space Begin?
Outer space is the expanse between the Earth and other celestial bodies.
How Big Are the Largest Known Asteroids?
Just how massive can an asteroid get? Explore the largest known asteroids in our solar system, their dimensions, and what makes these space giants unique.
How Did The First Galaxies Form?
The first galaxies formed as large groups of star clusters came together to form small galaxies, which then merged together to form larger galaxies.
What are the Gas Giants?
Giant planets are planets of massive size and are usually composed of low-boiling-point materials.
The Big Crunch
A theoretical model for how the universe will end assumes just that: eventually, the expansion of space will halt, and the universe will begin to contract.
Neptune’s Moon Triton
Neptune is orbited by 14 moons. Triton is the largest moon of Neptune and one of the strangest, most unique moons in the entire solar system.
The Most Common Elements In The Universe
Some elements are more common than others, with the amount of any given element in the universe related to its simplicity and formation within stars.
The Fastest Winds In The Solar System
Neptune is home the fastest recorded wind speeds in the solar system. The extreme winds are driven by Neptune’s internal temperatures.
The Northern Lights (Aurora Borealis) Explained
Although the aurora are generally green, they can come in a multitude of different colors. The color is determined by the atoms that are being ionized.
The Largest Solar Flare Ever Recorded
The largest solar flare ever recorded occurred in 1859 and was called the Carrington Event. As an X45-class flare, it caused widespread disruption on Earth.
10 Fascinating Facts About Our Solar System
The Solar System showcases paradoxes with a massive star, Kuiperian dwarfs, and complex dynamics, revealing gravitational insights and cosmic mysteries.
10 Fascinating Facts About Venus
Don't know much about Venus? This article will give you 10 amazing facts about our solar system's hottest planet that you wish you had known sooner.
What Is Planetary Protection?
Planetary Protection is a set of precautions that space organizations take to ensure that Earth-life does not contaminate potentially habitable worlds.
What Is The Difference Between A Star And A Planet?
Stars generate energy through nuclear fusion and are luminous, while planets are cooler bodies reflecting light and orbiting stars.
Planets With The Most Moons
As of March 2025, Saturn leads with 274 moons, revealing insights into planetary formation and detection techniques across the Solar System.
How Many Planets Are There In The Solar System?
The IAU in 2006 defined eight planets, leading to Pluto's reclassification as a dwarf planet and differentiating planetary categories.
How Far Is The Moon From Earth?
The average distance of the Moon from Earth is 384,400 km, varying between 363,300 km at perigee and 405,500 km at apogee.