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Galaxies
Huge systems of stars, gas, dust and dark matter held together by gravity. Earth lies in the Milky Way.
🚀 Student Knowledge Project · 2026
Cosmic ExplorerA Journey Through Space
Explore planets, stars, galaxies, black holes, astronauts, telescopes and humanity’s greatest missions—then test your knowledge with three interactive space games.
The Universe in Numbers
A few numbers that reveal the extraordinary scale of our cosmic home.
13.8billion years old
8major planets
1star in our Solar System
5recognised dwarf planets
100B+stars in the Milky Way
What Is the Universe?
The universe includes all space, time, matter and energy—from tiny particles to the largest galaxy clusters.
The Big Bang and cosmic expansion
Scientists estimate that the universe began about 13.8 billion years ago in an extremely hot, dense state. As space expanded and cooled, particles formed atoms. Gravity gathered gas into the first stars and galaxies. The universe continues to expand today.
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Stars
Glowing spheres of plasma that release energy through nuclear fusion. Our Sun is a star.
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Black Holes
Regions where gravity is so intense that nothing can escape after crossing the event horizon.
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Nebulae
Clouds of gas and dust. Some are stellar nurseries; others are remains of dying stars.
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Constellations
Recognisable star patterns seen from Earth, including Orion, Cassiopeia and Ursa Major.
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Dark Matter
Invisible matter inferred from its gravitational influence on galaxies and galaxy clusters.
Our Solar System
The Sun and everything bound to it by gravity: eight planets, moons, dwarf planets, asteroids and comets.
Mercury
Closest to the Sun and the smallest major planet.
Venus
The hottest planet because its thick atmosphere traps heat.
Earth
Our home and the only world known to support life.
Mars
The Red Planet, with giant volcanoes and ancient water evidence.
Jupiter
The largest planet, famous for the Great Red Spot.
Saturn
A gas giant surrounded by a spectacular system of icy rings.
Uranus
An ice giant that rotates almost completely on its side.
Neptune
The farthest major planet, with extremely powerful winds.
Planet Comparison
Scroll sideways on small screens to view the complete table.
| Planet | Type | Position | Known for |
|---|---|---|---|
| Mercury | Rocky | 1st | Smallest planet |
| Venus | Rocky | 2nd | Hottest planet |
| Earth | Rocky | 3rd | Known life |
| Mars | Rocky | 4th | Red appearance |
| Jupiter | Gas giant | 5th | Largest planet |
| Saturn | Gas giant | 6th | Ring system |
| Uranus | Ice giant | 7th | Sideways rotation |
| Neptune | Ice giant | 8th | Fast winds |
Astronomy
The scientific study of celestial objects, space and the physical universe.
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Optical Telescopes
Collect visible light to reveal planets, stars, nebulae and galaxies.
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Radio Astronomy
Uses radio waves to investigate pulsars, gas clouds and distant galaxies.
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Planetary Science
Studies planets, moons, asteroids and comets and how they formed.
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Cosmology
Examines the origin, structure, evolution and future of the universe.
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Astrophysics
Uses physics and mathematics to explain cosmic objects and events.
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Astrobiology
Studies life’s origins and the possibility of life beyond Earth.
Famous Astronauts
Pioneers who expanded humanity’s experience beyond Earth.
Neil Armstrong
First person to walk on the Moon during Apollo 11 in 1969.
Yuri Gagarin
First human to travel into space and orbit Earth, in 1961.
Rakesh Sharma
First Indian citizen to travel into space, in 1984.
Kalpana Chawla
First woman of Indian origin to travel into space.
Sunita Williams
Known for long-duration missions and numerous spacewalks.
Buzz Aldrin
Second person to walk on the Moon during Apollo 11.
Milestones in Space Exploration
A brief timeline of missions that changed our understanding of space.
1957 — Sputnik 1
The first artificial satellite to orbit Earth.
1961 — Vostok 1
Yuri Gagarin became the first human in space.
1969 — Apollo 11
Humans landed and walked on the Moon for the first time.
1977 — Voyager 1 and 2
Robotic explorers began their journeys through the outer Solar System.
2013–2014 — Mangalyaan
India’s Mars Orbiter Mission successfully entered orbit around Mars.
2023 — Chandrayaan-3
India achieved a successful soft landing near the Moon’s south polar region.
Random Space Fact
Discover a different fact each time you press the button.
A light-year is a unit of distance, not time.
🎮 Space Games
Three games that work with mouse, keyboard, touch and responsive screens.
Space Quiz
Press Start Quiz to begin.
Score: 0
Catch the Asteroid
Tap or click the moving asteroid before the 15-second timer ends.
Score: 0 · Time: 15
Guess the Planet
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Press New Planet for a clue.
Score: 0
About This Project
Cosmic Explorer – A Journey Through Space is an educational website created by Adhyay, Class 6, in 2026. It combines astronomy information with interactive features to make learning engaging and memorable.
This standalone page uses HTML for structure, CSS for responsive design and JavaScript for the colour themes, random facts and games.