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Astronomy definition is - the study of objects and matter outside the earth's atmosphere and of their physical and chemical properties. The Difference Between astronomy and astrology. Astronomy.com is for anyone who wants to learn more about astronomy events, cosmology, planets, galaxies, asteroids, astrophotography, the Big Bang, black holes.

Magnetic Waves Explain Mystery of Sun's Outer Layer

Solar System Formation in Two Steps

Search for Axions from Nearby Star Betelgeuse Comes Up Empty

Saturn's Moon Titan: Largest Sea Is 1,000-Feet Deep

Testing the Waters: Analyzing Different Solid States of Water on Other Planets and Moons

Exploring the Solar Wind With a New View of Small Sun Structures

Astronomers Dissect the Anatomy of Planetary Nebulae Using Hubble Space Telescope Images

Cosmic Beasts and Where to Find Them

Researchers Rewind the Clock to Calculate Age and Site of Supernova Blast

X-Rays Surrounding 'Magnificent 7' May Be Traces of Sought-After Particle

Galaxies Hit Single, Doubles, and Triple (Growing Black Holes)

Mapping Our Sun's Backyard

Giant Map of the Sky Sets Stage for Ambitious DESI Survey

Doubling the Number of Known Gravitational Lenses

Burst of Light April 15, 2020 Likely Magnetar Eruption in Nearby Galaxy

Could We Harness Energy from Black Holes?

Quasar Discovery Sets New Distance Record

An 'Old Faithful' Active Galaxy: Black Hole Rips Away at Star

Chandra X-Ray Observatory Studies Extraordinary Magnetar

Striped or Spotted? Winds and Jet Streams Found on the Closest Brown Dwarf

Astronomers Agree: Universe Is Nearly 14 Billion Years Old

A Blazar in the Early Universe

Key Clues to Understanding the Death of Stars

How Nearby Galaxies Form Their Stars

Multi-Messenger Astronomy Offers New Estimates of Neutron Star Size and Universe Expansion

• Galaxies Hit Single, Doubles, and Triple (Growing Black Holes)
• Mapping Our Sun's Backyard
• Giant Map of the Sky Sets Stage for Ambitious DESI Survey
• Doubling the Number of Known Gravitational Lenses

• Burst of Light April 15, 2020 Likely Magnetar Eruption in Nearby Galaxy
• Could We Harness Energy from Black Holes?

• Quasar Discovery Sets New Distance Record
• An 'old Faithful' Active Galaxy: Black Hole Rips Away at Star

• 'Galaxy-Sized' Observatory Sees Potential Hints of Gravitational Waves
• Measurements of Pulsar Acceleration Reveal Milky Way's Dark Side
• ALMA Captures Distant Colliding Galaxy Dying out as It Loses the Ability to Form Stars

• Chandra X-Ray Observatory Studies Extraordinary Magnetar

• Striped or Spotted? Winds and Jet Streams Found on the Closest Brown Dwarf

• Astronomers Agree: Universe Is Nearly 14 Billion Years Old

• Primordial Black Holes and the Search for Dark Matter from the Multiverse

• A Blazar in the Early Universe
• Key Clues to Understanding the Death of Stars

• How Nearby Galaxies Form Their Stars
• The Upside of Volatile Space Weather
• Multi-Messenger Astronomy Offers New Estimates of Neutron Star Size and Universe Expansion

• Recently Discovered Comet Seen During 2020 Total Solar Eclipse
• Compressive Fluctuations Heat Ions in Space Plasma

• Longest Intergalactic Gas Filament Discovered

• Dark Storm on Neptune Reverses Direction, Possibly Shedding a Fragment
• Saturn Moon, Enceladus, Could Support Life in Its Subsurface Ocean
• Astronomers Detect Possible Radio Emission from Exoplanet
• A Pair of Lonely Planet-Like Objects Born Like Stars

• Device Mimics Life's First Steps in Outer Space
• The Farthest Galaxy in the Universe
• Powerful Electrical Events Quickly Alter Surface Chemistry on Mars, Other Planetary Bodies

• Water on Mars Not as Widespread as Previously Thought

• Exoplanet Around Distant Star Resembles Reputed 'Planet Nine' In Our Solar System
• A Look at the Sun's Dusty Environment

• Space Weather Discovery Puts 'habitable Planets' At Risk
• New Superhighway System Discovered in the Solar System

• Dark Coating Can Reduce Satellite Reflectivity

• Image-Based Navigation Could Help Spacecraft Safely Land on the Moon
• Aluminium Alloy Research Could Benefit Manned Space Missions

• Researchers Uncover Key Clues About the Solar System's History
• Supercomputer Simulations Could Unlock Mystery of Moon's Formation

• Leaving So Soon? Unusual Planetary Nebula Fades Mere Decades After It Arrived
• Gaia Space Telescope Measured the Acceleration of the Solar System
• Scientists Peer Into the 3D Structure of the Milky Way
• Astronomers to Release Most Accurate Data Ever for Nearly Two Billion Stars
• Voyager Spacecraft Detect New Type of Solar Electron Burst

• Best Region for Life on Mars Was Far Below Surface
• Research Suggests Our Galaxy's Brightest Gamma-Ray Binary System May Be Powered by a Magnetar Star
• A Hint of New Physics in Polarized Radiation from the Early Universe

• Experiments Unravelling the Mystery of Mars' Moon Phobos
• New Hubble Data Explains Missing Dark Matter
• Earth Faster, Closer to Black Hole, in New Map of Galaxy
• Fast-Moving Gas Flowing Away from Young Star Caused by Icy Comet Vaporization
• Puzzling 'cold Quasar' Forming New Stars in Spite of Active Galactic Nucleus

• New Insights on Health Effects of Long-Duration Space Flight
• Space Travel Can Adversely Impact Energy Production in a Cell

• Blast from the Past

• Galaxy Encounter Violently Disturbed Milky Way
• Growing Interest in Moon Resources Could Cause Tension
• Milky Way Family Tree

• Field Geology at Mars' Equator Points to Ancient Megaflood

• Blue Ring Nebula: 16-Year-Old Cosmic Mystery Solved, Revealing Stellar Missing Link

• Cosmic Flashes Come in All Different Sizes
• Building Blocks of Life Can Form Long Before Stars
• Scientists Expand Space Instrument's Capabilities
• NASA's SpaceX Crew-1 Astronauts Headed to International Space Station

• History of Temperature Changes in the Universe Revealed

• Escape from Mars: How Water Fled the Red Planet
• Birth of Magnetar from Colossal Collision Potentially Spotted for First Time

• Tree Rings May Hold Clues to Impacts of Distant Supernovas on Earth
• Dark Matter from the Depths of the Universe

• Researchers Model Source of Eruption on Jupiter's Moon Europa
• Radioactive Elements May Be Crucial to the Habitability of Rocky Planets
• Black Hole or No Black Hole: On the Outcome of Neutron Star Collisions
• The Universe Is Getting Hot, Hot, Hot, a New Study Suggests
• Mining Rocks in Orbit Could Aid Deep Space Exploration

• First Brown Dwarf Discovered by Radio Observations Confirmed
• Water May Be Naturally Occurring on All Rocky Planets
• Stellar Flares Can Lead to Diminishment of a Planet's Habitability

• Final Dance of Unequal Black Hole Partners
• Has the Hidden Matter of the Universe Been Discovered?
• Seeing Dark Matter in a New Light
• About Half of Sun-Like Stars Could Host Rocky, Potentially Habitable Planets
• Astronomers Discover Clues That Unveil the Mystery of Fast Radio Bursts

• Clay Subsoil at Earth's Driest Place May Signal Life on Mars

• Detection of a Short, Intense Radio Burst in Milky Way
• Microbial Space Travel on a Molecular Scale
• Supersonic Winds, Rocky Rains Forecasted on Lava Planet

• New Remote Sensing Technique Could Bring Key Planetary Mineral Into Focus
• First Light on a Next-Gen Astronomical Survey Toward a New Understanding of the Cosmos

• Water on Ancient Mars
• Asteroid's Scars Tell Stories of Its Past
• Most Isolated Massive Stars Are Kicked out of Their Clusters

Astronomy Vs Astrology

• Where Were Jupiter and Saturn Born?
• Measuring the Expansion of the Universe: Researchers Focus on Velocity

• Black Hole 'family Portrait' Is Most Detailed to Date
• Juno Data Indicates 'sprites' Or 'elves' Frolic in Jupiter's Atmosphere
• Astronomers Discover Activity on Distant Planetary Object
• How Dark Matter in Galaxies Is Distributed

Astronomy

• Astronomers Are Bulging With Data
• Gran Telescopio Canarias Finds the Farthest Black Hole That Belongs to a Rare Family of Galaxies

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A constellation is a grouping of stars that represents one of the 88 divisions of the celestial sphere as defined by the International Astronomical Union. Many constellations are derived from old traditional asterisms, which are star patterns within a constellation. An example: the Big Dipper is an asterism inside of the Ursa Major constellation.

Seasons listed are for mid-northern latitudes. For southern latitudes, flip the season listed. For example, if a constellation is listed as best viewed in the summer, in the southern hemisphere the constellation would be best viewed in the winter and would be upside-down. Circumpolar constellations are visible year-round in their hemisphere.

Constellations shown with a symbol are the Zodiac constellations.

Antlia
Air Pump

Aquarius ♒
Water Bearer

Ara
Altar

Auriga
Charioteer

Caelum
Chisel

Cancer ♋
Crab

Canis Major
Greater Dog

Capricornus ♑
Goat

Cassiopeia
Andromeda's mom

Cepheus
Ethiopia King

Chamaeleon
Chamaeleon

Columba
Dove

Corona Australis
Southern Crown

Corvus
Crow

Crux
Southern Cross

Delphinus
Dolphin

Draco
Dragon

Eridanus
River

Gemini
Twins

Hercules
Hercules

Hydra
Water Monster

Indus
Indian

Leo ♌
Lion

Lepus
Hare

Lupus
Wolf

Lyra
Harp

Microscopium
Microscope

Astronomy Definition

Musca
Fly

Octans
Octant

Orion
Hunter

Pegasus
Winged Horse

Phoenix
Phoenix

Pisces ♎
Fishes

Puppis
Stern

Reticulum
Reticle

Sagittarius ♐
Archer

Sculptor
Sculptor

Serpens
Serpent

Taurus ♉
Bull

Triangulum
Triangle

Tucana
Toucan

Ursa Minor
Little Bear

Astronomy Jobs

Virgo
Virgin

Astronomy Club

Vulpecula
Fox