Universe Today’s Guide to Space

The Solar System:

• Solar System Guide
• The Sun
• Mercury
• Venus
• Earth
  • The Moon
  • Near-Earth Objects (NEOs)
• Mars
  • Phobos and Deimos
• The Asteroid Belt
  • Ceres
  • Vesta
• Jupiter
  • Jupiter’s Moons
  • Galilean Moons
• Saturn
  • Saturn’s Moons
• Uranus
  • Uranus’ Moons
• Neptune
  • Neptune’s Moons
• Dwarf Planets
• The Kuiper Belt
• The Oort Cloud
• Comets, Asteroids, and KBOs

Outer Space:

• Stars
• Magnetars
• Variable Stars
• Wolf-Rayet Stars
• Extrasolar Planets (Exoplanets)
  • The Direct Imaging Method
  • The Gravitational Microlensing Method
  • The Radial Velocity Method
  • The Transit Method
• 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
  • Part I: Insects and Arachnids
  • Part II: Mice and Other Small Animals
  • Part III: Dogs, Monkeys, and More
  • How Many Dogs Have Been to Space?
• Artificial Satellites
• Benefits of Space Exploration
• Colonizing the Inner/Outer Solar System
  • Colonizing Mercury
  • Colonizing Venus
  • Colonizing the Moon
  • Colonizing Mars
  • Colonizing Ceres
  • Colonizing Jupiter’s Moons
  • Colonizing Saturn’s Moons
  • Terraforming vs. Space Habitats
• Definitive Guide to Terraforming
  • Terraforming Mercury
  • Terraforming Venus
  • Terraforming the Moon
  • Terraforming Mars
    • Could We Marsiform Ourselves?
  • Terraforming Ceres
  • Terraforming Jupiter’s Moons
  • Terraforming Saturn’s Moons
  • Could We Terraform the Sun?
  • Could We Terraform Jupiter?
  • Could We Terraform a Black Hole?
• Interstellar Exploration
  • Advanced Propulsion
  • Alcubierre Warp Drive
  • Benefits of an Interstellar Probe
  • Electric Sails
  • Exploring the Nearest Star
  • Generation Ships
  • Halo Drive
  • How Does Light Travel?
  • How Far is a Light Year?
  • How Fast is the Speed of Light?
  • How Long Would it Take to Travel to the Nearest Star?
  • Pros and Cons of Methods
  • Solar Sails vs. Magnetic Sails
  • Will We Ever Reach Another Star?

History of Space Exploration:

• Agreements and Treaties
  • Artemis Accords
  • Moon Treaty
  • National Aeronautics and Space Act
  • Outer Space Treaty
  • Space Court Foundation
• Landers
• Orbiters/Probes
• Rovers
• Space Age
• Spaceflight
  • U.S. Space Missions
  • Soviet/Russian Space Missions
  • Astronauts
• Spaceships
• Space Stations
  • Salyut
  • Skylab
  • Mir
  • The International Space Station (ISS)

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
  • Galileo’s Inventions
  • Galileo’s Telescope
• 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
  • Sir Isaac Newton’s Discoveries
  • Sir Isaac Newton’s Inventions
• Stephen Hawking
• Tycho Brahe
• Urbain Le Verrier
• William Herschel
• William Lassell

Famous Astronauts:

• Alan Shepard Jr.
• Albert II
• Belka and Strelka
• Chris Hadfield
• Edwin “Buzz” Aldrin
• Félicette
• 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

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
  • Special Relativity
  • General 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)

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?

SETI:

• Search for Extra-Terrestrial Intelligence (SETI)
• Alien Minds
  • Part I: Are Extraterrestrial Civilizations Likely to Evolve?
  • Part II: Do Aliens Think Big Brains are Sexy Too?
  • Part III: The Octopus’ Garden and the Country of the Blind
• Arecibo Message
• Breakthrough Listen
• Biosignatures
• Communicating Across the Cosmos
  • Part I: Shouting Across the Darkness
  • Part II: Petabytes from the Stars
  • Part III: Bridging the Vast Gulf
  • Part IV: The Quest for a Rosetta Stone
• 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)
  • Mathematics: The Beautiful Language of the Universe
  • Part I: Is Universal Grammar Really Universal?
  • Part II: Hello There GJ273b
• Project Ozma
• Technosignatures
• Waiting for Extraterrestrial Intelligence (WETI)
• What Do We Do If We Find Aliens?
• WOW! Signal

Messier Objects:

• Introduction to the Messier Objects
• The Messier Catalog
• The Messier Marathon
• The Week-Long Messier Marathon

Constellations:

• What are the Constellations?
• Zodiac Signs and Dates

Telescopes:

• Adaptive Optics
• Earth Observatories
• Extreme Telescopes
• Orbiting Observatories
  • Chandra X-ray Observatory
  • Compton Gamma-ray Telescope
  • Gaia Observatory
  • Hubble Space Telescope (HST)
  • Kepler Space Telescope
  • Spitzer Space Telescope
  • Transiting Exoplanet Survey Satellite (TESS)
  • Wide-field Infrared Survey Explorer (WISE)
• 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)?

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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