The Solar System:
- Solar System Guide
- The Sun
- Mercury
- Venus
- Earth
- The Moon
- Near-Earth Objects (NEOs)
- Mars
- The Asteroid Belt
- Jupiter
- Saturn
- Uranus
- Neptune
- Dwarf Planets
- The Kuiper Belt
- The Oort Cloud
- Comets, Asteroids, and KBOs
![](https://www.universetoday.com/wp-content/uploads/2017/07/Planet_Nine_animation.gif)
Outer Space:
- Stars
- Magnetars
- Variable Stars
- Wolf-Rayet Stars
- Extrasolar Planets (Exoplanets)
- Nebulae
- Black Holes
- Interstellar Space
- The Milky Way
- Magellanic Clouds
- Small Magellanic Cloud (SMC)
- Large Magellanic Cloud (LMC)
- Active Galactic Nuclei
- Galaxies
- Galaxy Clusters
- Intergalactic Space
- Superclusters
- The Universe
- Fun Facts About Space
Space Exploration:
- Animals in Space
- Artificial Satellites
- Benefits of Space Exploration
- Colonizing the Inner/Outer Solar System
- Definitive Guide to Terraforming
- Interstellar Exploration
History of Space Exploration:
- Agreements and Treaties
- Landers
- Orbiters/Probes
- Rovers
- Space Age
- Spaceflight
- Spaceships
- Space Stations
![](https://www.universetoday.com/wp-content/uploads/2008/04/537117main_EC81-15507_full_full-1024x1024.jpg)
Famous Scientists:
- Albert Einstein
- Aristotle
- Aryabhata
- Avenpace (Ibn Bajja)
- Avicenna (Ibn-Sina)
- Charles Messier
- Christiaan Huygens
- Democritus
- Edmond Halley
- Edwin Hubble
- Enrico Fermi
- Francis Bacon
- Frank Drake
- Fred Hoyle
- Galileo Galilee
- Gerard Kuiper
- Giovanni Domenico Cassini
- James Clerk Maxwell
- Jan Oort
- Johann Bode
- Johannes Kepler
- Johannes Gottfried Galle
- John Dalton
- John Herschel
- Konstantin Tsiolkovsky
- Lord Kelvin (William Thomson)
- Max Planck
- Miguel Alcubierre
- Nicolas Louis de Lacaille
- Nicolaus Copernicus
- Niels Bohr
- Nilakantha Somayaji
- Ptolemy
- Qutb al-Din al-Shirazi
- René Descartes
- Robert Boyle
- Robert Hooke
- Sergei Korolev
- Sir Isaac Newton
- Stephen Hawking
- Tycho Brahe
- Urbain Le Verrier
- William Herschel
- William Lassell
![Einstein Lecturing](https://www.universetoday.com/wp-content/uploads/2014/01/Einstein_1921_by_F_Schmutzer-1024x612.jpg)
Famous Astronauts:
- Alan Shepard Jr.
- Albert II
- Belka and Strelka
- Chris Hadfield
- Edwin “Buzz” Aldrin
- FĂ©licette
- Franklin Chan-Diaz
- Gennady Padalka
- Gordo
- James Lovell Jr.
- Jeff Williams
- John Glenn Jr.
- Laitka
- Neil Armstrong
- Peggy Wilson
- Sally Ride
- Scott & Mark Kelly
- Valentina Tereshkova
- Valeri Polyakov
- Yuri Gagarin
- Yuri Malenchenko
- Who are the Most Famous Astronauts?
Astronomy Jargon:
- Absolute Magnitude
- Adaptive Optics
- Albedo
- Astronomical Unit (AU)
- Aurorae
- Baryon Acoustic Oscillations
- Black Holes
- Big Bang Theory
- Bollide
- Coma
- Cosmic Microwave Background
- Cosmic Strings
- Chromosphere
- Cosmic Rays
- Dark Matter
- Doppler Shift
- Eccentricity
- Electromagnetism
- Elliptical Galaxy
- Escape Velocity
- Event Horizon
- Galactic Halo
- Galaxy Clusters
- Galilean Moons
- Giant Molecular Cloud
- Globular Clusters
- Gravity
- Gravitational Lens
- Heliopause
- Heliosphere
- Hertzberg-Russell (HR) Diagram
- Hubble’s Law
- Hydrostatic Equilibrium
- Interstellar Medium
- Ionosphere
- Irregular Galaxies
- Kirkwood Gaps
- Local Group
- Luminosity
- Magnetars
- Magellanic Clouds
- Neutrinos
- Neutron Star
- Nova
- Open Cluster
- Parallax
- Planet
- Planetary Nebula
- Protoplanetary Disk
- Quasar
- R-Process
- Spectrum
- Standard Candles
- Strong Nuclear Force
- Sunspots
- Tidal Heating
- Trans-Neptunian Object (TNO)
- Type-1a Supernovae
- Type-II Supernovae
- Umbra
- Van Allen Belts
- Weak Nuclear Force
- White Dwarf
- Wolf-Rayet Stars
- Wormholes
- Zodiacal Light
![](https://www.universetoday.com/wp-content/uploads/2008/04/cropped-gw170817_illus2-1-1024x614.jpg)
Astronomy & Cosmology:
- Astronomy
- Astronomy for Kids
- Big Bang Theory: Evolution of Our Universe
- Biggest Mysteries in Astronomy
- Biggest Planet in the Solar System
- Biggest Star
- Biggest Thing in the Universe
- Butterfly Effect
- Eddington Eclipse Experiment
- Entropy
- Geocentric Model
- Geocentric vs. Heliocentric
- Gravity Mapping
- Heliocentric Model
- Hubble Constant
- Hubble-Lemaitre Law
- How Do We Know Dark Energy Exists?
- How Do We Know Dark Matter Exists?
- How Big is the Universe?
- Infrared Astronomy
- Infrared Spectroscopy
- Oscillating Universe Theory
- Physics
- Radio Astronomy
- Relativity
- Singularity
- Spectroscopy
- Standard Model
- Steady State Hypothesis
- Time and Space
- What are Gravitational Waves?
- What is the Big Rip?
- What is the Cosmic Microwave Background?
- Will the Big Bang Go Backwards? (Big Crunch)
![](https://www.universetoday.com/wp-content/uploads/2016/08/HFF.jpg)
Earth Sciences:
- 10 Interesting Facts About Earth
- Abiogenesis
- Avalanche
- Bakken Formation
- Benefits of Volcanoes
- Biggest Volcano on Earth
- Butte
- Celestial Sphere
- Cepheid Variable
- Climate Change
- Climatology
- Continental Crust
- Continents
- Cyclones
- Debris Flow
- Driest Place on Earth
- Earth Formation
- Earth’s Layers
- Earth’s Mantle
- Earth’s Rotation
- Earth Science
- Earthquake
- Earthquake Causes
- Erosion
- Fossil Fuels
- Geology
- Geomorphology
- Geosphere
- How Do Volcanoes Erupt?
- Hurricanes
- Ice Age
- Igneous Rock Formation
- Largest Desert on Earth
- Largest Island in the World
- Lava and Magma
- Lithosphere
- Mid-Atlantic Ridge
- Mountain Formation
- Plate Boundaries
- Temperature of Earth’s Crust
- Volcanoes
- Wettest Place on Earth
- Why Does it Rain?
![](https://www.universetoday.com/wp-content/uploads/2008/04/All_messier_objects_numbered-1024x576.jpg)
SETI:
- Search for Extra-Terrestrial Intelligence (SETI)
- Alien Minds
- Arecibo Message
- Breakthrough Listen
- Biosignatures
- Communicating Across the Cosmos
- Drake Equation
- Fermi Paradox
- Beyond “Fermi’s Paradox” I: A Lunchtime Conversation- Enrico Fermi and Extraterrestrial Intelligence
- Beyond “Fermi’s Paradox” II: Questioning the Hart-Tipler Conjecture
- Beyond “Fermi’s Paradox” III: What is the Great Filter?
- Beyond “Fermi’s Paradox” IV: What is the Rare Earth Hypothesis?
- Beyond “Fermi’s Paradox” V: What is the Aestivation Hypothesis?
- Beyond “Fermi’s Paradox” VI: What is the Berserker Hypothesis?
- Beyond “Fermi’s Paradox” VII: What is the Planetarium Hypothesis?
- Beyond “Fermi’s Paradox” VIII: What is the Zoo Hypothesis?
- Beyond “Fermi’s Paradox” IX: What is the Brief Window Hypothesis?
- Beyond “Fermi’s Paradox” X: What is the Firstborn Hypothesis?
- Beyond “Fermi’s Paradox” XI: What is the Transcension Hypothesis?
- Beyond “Fermi’s Paradox” XII: What is the Waterworlds Hypothesis?
- Beyond “Fermi’s Paradox” XIII: What is the “Ocean Worlds” Hypothesis?
- Beyond “Fermi’s Paradox” XIV: What is the Aurora Hypothesis?
- Beyond “Fermi’s Paradox” XV: What is the Percolation Theory Hypothesis?
- Beyond “Fermi’s Paradox” XVI: What is the “Dark Forest” Hypothesis?
- Beyond “Fermi’s Paradox” XVII: What is the “SETI-Paradox” Hypothesis?
- Galactic Habitable Zone
- Habitable Zone
- Kardashev Scale
- When Will Humanity Become a Type I Civilization?
- When Will Humanity Become a Type II Civilization?
- When Will Humanity Become a Type III Civilization?
- Lorimar Burst
- Megastructures
- Messaging Extra-Terrestrial Intelligence (METI)
- Project Ozma
- Technosignatures
- Waiting for Extraterrestrial Intelligence (WETI)
- What Do We Do If We Find Aliens?
- WOW! Signal
![](https://www.universetoday.com/wp-content/uploads/2011/11/artifacts_golden_record-1024x576.jpg)
Messier Objects:
- Introduction to the Messier Objects
- The Messier Catalog
- The Messier Marathon
- The Week-Long Messier Marathon
Constellations:
Telescopes:
- Adaptive Optics
- Earth Observatories
- Extreme Telescopes
- Orbiting Observatories
- Radio Observatories
- The Rise of the Super Telescopes
- The Giant Magellan Telescope (GMT)
- The Overwhelmingly Large Telescope (OLT)
- The 30 Meter Telescope (TMT)
- The European Extremely Large Telescope (ELT)
- The Large Synoptic Survey Telescope (LSST)
- The James Webb Space Telescope (JWST)
- The Wide Field Infrared Survey Telescope (WFIRST)
- The Large UV Optical Infrared Surveyor (LUVOIR)
- What are Telescopes?
- What Are The Biggest Telescopes In The World (And Space)?
![This artist’s rendering shows the Extremely Large Telescope in operation on Cerro Armazones in northern Chile. The telescope is shown using lasers to create artificial stars high in the atmosphere. Image: ESO/E-ELT](https://www.universetoday.com/wp-content/uploads/2017/05/eso1716a-1024x725.jpg)
Image Credits:
- Observable Universe: Pablo Carlos Budassi
- Animated Solar System: Caltech/nagualdesign
- Space Shuttle Columbia: NASA
- Albert Einstein: National Library of Austria/F Schmutzer/Public Domain
- Apollo 11 Crew: NASA
- GW170817 Black Hole: NASA/CXC/M.Weiss
- Hubble Deep Field: NASA and A. Feild (STScI)
- Messier Objects: Michael A. Phillips
- Voyager Golden Record: NASA
- Extremely Large Telescope: ESO/E-ELT