Menu

Navigation

More options

Style variation

Contact us

Astronomy and Astrophysics Forum

Join in expert discussion on the topics of Astronomy and astrophysics. This may include discussion on celestial objects, space, and the physical universe as a whole. Mainstream science only.

Filters

Asteroid hazard revised: Nature.com

Jul 17, 2003 · Replies 5 · Jul 29, 2003

Replies: 5

Views: 3K

Does the Cosmological Constant Exist?

Jul 25, 2003 · Replies 15 · Jul 27, 2003

Replies: 15

Views: 7K

Newfound Stars are Huge, Powerful and Frantic: Space.com

Jul 24, 2003 · Replies 1 · Jul 25, 2003

Replies: 1

Views: 3K

J1148+5251 is the most distant object known

Jul 25, 2003 · Replies 5 · Jul 25, 2003

Replies: 5

Views: 4K

Uncovering the Mystery of a 12.8 Billion Year Old Planet

Jul 11, 2003 · Replies 25 · Jul 24, 2003

Replies: 25

Views: 6K

Brief perspective on notion of the big bang

Jul 21, 2003 · Replies 19 · Jul 23, 2003

Replies: 19

Views: 4K

On the topic of curved spacetimes

Jul 13, 2003 · Replies 6 · Jul 23, 2003

Replies: 6

Views: 3K

Discover the Mind-Blowing Count of 70 Sextillion Stars in the Universe

Jul 22, 2003 · Replies 8 · Jul 23, 2003

Replies: 8

Views: 6K

Distance of a Supernova Candidate from Earth: Is it Safe?

Jul 23, 2003 · Replies 1 · Jul 23, 2003

Replies: 1

Views: 4K

Curved Space: Understanding the Concept of Twisting in Physics

Jul 17, 2003 · Replies 31 · Jul 21, 2003

2

Replies: 31

Views: 5K

Uncovering the Origins of the Universe: Insights from the Big Bang Singularity

Jul 20, 2003 · Replies 11 · Jul 21, 2003

Replies: 11

Views: 3K

Is Gravity Caused by the Motion of Particles in the Fabric of Space?

Apr 6, 2003 · Replies 463 · Jul 18, 2003

16

Replies: 463

Views: 71K

Questions About Nebulas & Protostars - Get Answers Now

Jul 18, 2003 · Replies 1 · Jul 18, 2003

Replies: 1

Views: 9K

After Big Bang: Hydrogen & Helium Formed, But Why Didn't They Burn?

Jul 18, 2003 · Replies 6 · Jul 18, 2003

Replies: 6

Views: 3K

The Moon's Impact on Earth: More Than Just a Source of Myths?

Jul 12, 2003 · Replies 13 · Jul 18, 2003

Replies: 13

Views: 11K

Lineweaver(May 2003)-web's best cosmology tutorial

Jun 26, 2003 · Replies 6 · Jul 18, 2003

Replies: 6

Views: 4K

Time zero glitch fades out/less need for inflation

Jul 15, 2003 · Replies 7 · Jul 18, 2003

Replies: 7

Views: 3K

Searching for a string explanation

Jul 13, 2003 · Replies 108 · Jul 17, 2003

4

Replies: 108

Views: 13K

Oldest Planet Discovery: What Does it Reveal About Our Understanding of Age?

Jul 17, 2003 · Replies 1 · Jul 17, 2003

Replies: 1

Views: 3K

What is our actual Hubble speed ?

Jul 15, 2003 · Replies 18 · Jul 16, 2003

Replies: 18

Views: 4K

What is Our Actual Hubble Speed and How Does it Relate to CMB?

Jul 15, 2003 · Replies 6 · Jul 16, 2003

Replies: 6

Views: 4K

What Lies at the Center of the Universe?

Jul 4, 2003 · Replies 291 · Jul 15, 2003

10

Replies: 291

Views: 35K

Does Gravity Affect Light in Stars?

Jul 12, 2003 · Replies 12 · Jul 15, 2003

Replies: 12

Views: 3K

Why do we only see one side of the moon?

Jul 5, 2003 · Replies 65 · Jul 15, 2003

3

Replies: 65

Views: 30K

Why is inflation thought necessary in std. cosm.?

Jul 12, 2003 · Replies 18 · Jul 14, 2003

Replies: 18

Views: 5K

What makes a flat, finite universe seem unfeasible?

Jul 11, 2003 · Replies 8 · Jul 14, 2003

Replies: 8

Views: 4K

What question can we ask about Hubble constant measurement?

Jul 7, 2003 · Replies 15 · Jul 14, 2003

Replies: 15

Views: 5K

Before the Big Bang: The Leading Theory on the Birth of the Universe

Jul 11, 2003 · Replies 15 · Jul 13, 2003

Replies: 15

Views: 5K

Much of our understanding of the physics of AGN

Jul 12, 2003 · Replies 1 · Jul 13, 2003

Replies: 1

Views: 3K

Can Anyone Explain the Hertzsprung-Russell Diagram?

Jul 12, 2003 · Replies 1 · Jul 13, 2003

Replies: 1

Views: 3K

Why Is Understanding Curved Space Essential for Astronomy?

Jul 12, 2003 · Replies 24 · Jul 13, 2003

Replies: 24

Views: 5K

Number of Galaxies: Is It Infinite?

Jul 5, 2003 · Replies 74 · Jul 11, 2003

3

Replies: 74

Views: 13K

Is the Universe Really Not Expanding?

Jul 7, 2003 · Replies 46 · Jul 11, 2003

2

Replies: 46

Views: 11K

Can a Solar System Exist Without a Central Star?

Jul 6, 2003 · Replies 11 · Jul 10, 2003

Replies: 11

Views: 7K

Mars-56million km closer to earth

Jun 29, 2003 · Replies 3 · Jul 10, 2003

Replies: 3

Views: 3K

Orion's XT8 8 Dobsonian as a good beginner scope

Jun 30, 2003 · Replies 27 · Jul 10, 2003

Replies: 27

Views: 9K

How Does Quantum Probability Affect Discrete Space in Loop Quantum Gravity?

Jul 8, 2003 · Replies 2 · Jul 8, 2003

Replies: 2

Views: 3K

Absolute 0 at the before the begging

Jul 4, 2003 · Replies 6 · Jul 8, 2003

Replies: 6

Views: 4K

Falling Object at c: Relativistic Position Expression for the Attracted Object

Jul 3, 2003 · Replies 5 · Jul 7, 2003

Replies: 5

Views: 4K

How Will Our Solar System End

Jul 6, 2003 · Replies 12 · Jul 7, 2003

Replies: 12

Views: 7K

Aliens/Intelligant Life forms, do they exist?

May 17, 2003 · Replies 64 · Jul 7, 2003

3

Replies: 64

Views: 12K

Solar System Similar to Ours Found

Jul 4, 2003 · Replies 6 · Jul 7, 2003

Replies: 6

Views: 3K

How Do Black Hole Schematics Work?

Jul 4, 2003 · Replies 4 · Jul 6, 2003

Replies: 4

Views: 3K

Mystifying Star: Spinning So Fast It's Flattening Out?

Jun 29, 2003 · Replies 18 · Jul 2, 2003

Replies: 18

Views: 6K

Scary Statistics: American Beliefs from 2002-1969

Jun 19, 2003 · Replies 26 · Jul 1, 2003

Replies: 26

Views: 8K

What's there to see in the night sky at this time of year?

Jun 26, 2003 · Replies 11 · Jul 1, 2003

Replies: 11

Views: 4K

Solving the Mysteries of Galaxies

Jun 21, 2003 · Replies 9 · Jun 30, 2003

Replies: 9

Views: 4K

Calculating Galaxy Coordinates to Avoid Star Misplacement

Jun 17, 2003 · Replies 27 · Jun 30, 2003

Replies: 27

Views: 6K

Phobos is an Exceptionally Dark Object in the Solar System

Jun 26, 2003 · Replies 9 · Jun 29, 2003

Replies: 9

Views: 3K

What Are the Latest and Upcoming Missions to the Outer Planets?

Jun 28, 2003 · Replies 2 · Jun 28, 2003

Replies: 2

Views: 3K

Second black hole may lurk at Milky Way's heart

Jun 23, 2003 · Replies 1 · Jun 27, 2003

Replies: 1

Views: 3K

So, what is the right question to ask about this topic?

Jun 25, 2003 · Replies 6 · Jun 27, 2003

Replies: 6

Views: 3K

Moon-Earth Position: Apollo 8 Photo Examined

Jun 23, 2003 · Replies 7 · Jun 27, 2003

Replies: 7

Views: 3K

The Direction of Space: Is Light Traveling Around the Periphery?

Jun 12, 2003 · Replies 47 · Jun 26, 2003

2

Replies: 47

Views: 10K

Could Sub-Universes Exist Within an Infinite Multiverse?

Jun 22, 2003 · Replies 6 · Jun 25, 2003

Replies: 6

Views: 6K

Is the Universe Shaped Like a Three-Torus?

Jun 25, 2003 · Replies 2 · Jun 25, 2003

Replies: 2

Views: 6K

If everything was increased in size equally, would it matter?

May 22, 2003 · Replies 12 · Jun 25, 2003

Replies: 12

Views: 4K

Age of a Distant Galaxy: Is It Double?

Jun 23, 2003 · Replies 3 · Jun 25, 2003

Replies: 3

Views: 3K

Big Bang vs White Hole: The Truth Revealed

Jun 24, 2003 · Replies 3 · Jun 24, 2003

Replies: 3

Views: 4K

96 percent of cosmos puzzles astronomers

Jun 24, 2003 · Replies 3 · Jun 24, 2003

Replies: 3

Views: 3K

How Does Gravity Affect Light?

Jun 22, 2003 · Replies 1 · Jun 22, 2003

Replies: 1

Views: 5K

Are There Viable Alternatives to Dark Matter in Explaining Galactic Motion?

Jun 21, 2003 · Replies 3 · Jun 22, 2003

Replies: 3

Views: 3K

What are Stephen Hawking's Calculations on the Eternity of the Universe?

Jun 19, 2003 · Replies 4 · Jun 21, 2003

Replies: 4

Views: 7K

Understand Doppler Effect: Hubble & Stars Moving Away

Jun 21, 2003 · Replies 5 · Jun 21, 2003

Replies: 5

Views: 3K

Strange star puzzles astronomers: BBC

Jun 18, 2003 · Replies 4 · Jun 21, 2003

Replies: 4

Views: 4K

Absolute zero for the boomerang nebula?

Jun 20, 2003 · Replies 4 · Jun 21, 2003

Replies: 4

Views: 4K

Is the Sun More Spherical or Oval? Investigating the Shape of Our Closest Star

Jun 18, 2003 · Replies 4 · Jun 20, 2003

Replies: 4

Views: 11K

Will Earth's Moon Follow Other Moons into a Ring System?

Jun 19, 2003 · Replies 7 · Jun 20, 2003

Replies: 7

Views: 5K

Mars Closest to Earth: Latest News & Mission Plans

Jun 15, 2003 · Replies 5 · Jun 18, 2003

Replies: 5

Views: 6K

A question of Planetary formation.

Jun 12, 2003 · Replies 14 · Jun 18, 2003

Replies: 14

Views: 3K

Dark Matter: What Is It & How Will It Change Astronomy?

Jun 11, 2003 · Replies 15 · Jun 17, 2003

Replies: 15

Views: 5K

Slowing Down a Telescope: Showercaps, Endcaps & Dustcovers

Jun 15, 2003 · Replies 2 · Jun 15, 2003

Replies: 2

Views: 3K

Does nonbaryonic dark matter exist?

Jun 13, 2003 · Replies 1 · Jun 14, 2003

Replies: 1

Views: 4K

Stargazing Need advice/opinions on a telescope

Jun 7, 2003 · Replies 9 · Jun 13, 2003

Replies: 9

Views: 4K

Source of Energy for the Rotation of Earth

May 16, 2003 · Replies 11 · Jun 13, 2003

Replies: 11

Views: 7K

Universe can surf the Big Rip; Nature article

Jun 12, 2003 · Replies 1 · Jun 12, 2003

Replies: 1

Views: 3K

The Moon's Impact on Earth: What Happens Without It?

Jun 10, 2003 · Replies 10 · Jun 11, 2003

Replies: 10

Views: 4K

Bad astronomy spurs good laughter

Jun 9, 2003 · Replies 3 · Jun 10, 2003

Replies: 3

Views: 8K

Solving Hubble Constant with rhocrit and Cosmological Constant

Jun 8, 2003 · Replies 15 · Jun 9, 2003

Replies: 15

Views: 5K

Poll

Fact or Fiction? Cosmology Statements

May 29, 2003 · Replies 2 · Jun 9, 2003

Replies: 2

Views: 6K

Is Earth Alone in a Universe Full of Stars?

Jun 5, 2003 · Replies 11 · Jun 9, 2003

Replies: 11

Views: 4K

What Are the Big Changes on Mars?

Jun 8, 2003 · Replies 1 · Jun 9, 2003

Replies: 1

Views: 3K

Is the Expansion of Space Truly Universal?

Jun 6, 2003 · Replies 9 · Jun 9, 2003

Replies: 9

Views: 4K

Poll

What is the current radius of the observable universe?

May 15, 2003 · Replies 33 · Jun 7, 2003

2

Replies: 33

Views: 12K

Light Years And Expanding Universe

Jun 7, 2003 · Replies 3 · Jun 7, 2003

Replies: 3

Views: 3K

Iron Fusion in Stars: Uncovering the Mysteries of Heavy Elements on Earth

Jun 7, 2003 · Replies 5 · Jun 7, 2003

Replies: 5

Views: 8K

Did Carl Sagan Lobby for This Iconic Image of Earth from Mars Orbit?

May 23, 2003 · Replies 6 · Jun 7, 2003

Replies: 6

Views: 6K

Information request about Galaxies

Jun 5, 2003 · Replies 4 · Jun 6, 2003

Replies: 4

Views: 3K

Discover the Speed of Our Solar System

Jun 4, 2003 · Replies 9 · Jun 6, 2003

Replies: 9

Views: 6K

Has the Universe Slowed Its Expansion?

May 28, 2003 · Replies 2 · Jun 5, 2003

Replies: 2

Views: 3K

Understanding the Sun's Gravity and Its Impact on Planetary Orbits

May 2, 2003 · Replies 35 · Jun 5, 2003

2

Replies: 35

Views: 32K

Notion of matter, space and time

May 28, 2003 · Replies 67 · Jun 4, 2003

3

Replies: 67

Views: 9K

Estimating Critical Mass for Expansion

Jun 2, 2003 · Replies 4 · Jun 3, 2003

Replies: 4

Views: 4K

Space Genetics: A Weird Physics Theory on Mass, Radiation, and the Universe

May 29, 2003 · Replies 6 · Jun 3, 2003

Replies: 6

Views: 4K

What Caused Uranus' Unique Rotation?

Jun 1, 2003 · Replies 2 · Jun 2, 2003

Replies: 2

Views: 4K

Stargazing Best Telescope Recommendations for City Viewing Near NYC

May 20, 2003 · Replies 21 · Jun 1, 2003

Replies: 21

Views: 6K

Poll

Which is the metric of the Universe?

May 30, 2003 · Replies 12 · Jun 1, 2003

Replies: 12

Views: 4K

What is the density in atoms per unit volume of most nebulas?

May 30, 2003 · Replies 1 · Jun 1, 2003

Replies: 1

Views: 3K

Tevatron Explained: Emmy Noether's Mass Page

May 30, 2003 · Replies 4 · May 30, 2003

Replies: 4

Views: 3K

Poll

What's your estimate of the other Drake equation?

May 25, 2003 · Replies 12 · May 29, 2003

Replies: 12

Views: 3K

Astronomy

Astronomy is the scientific study of celestial objects and phenomena beyond Earth's atmosphere. It encompasses the observation and analysis of stars, planets, galaxies, and other celestial bodies, as well as the broader exploration of the universe's origins, structure, and evolution.

Astronomers employ a variety of tools, including telescopes, satellites, and advanced instrumentation, to gather data and uncover the mysteries of the cosmos. The field addresses questions about the nature of dark matter, the expansion of the universe, and the potential for extraterrestrial life.

Astronomy not only contributes to our understanding of the cosmos but also inspires wonder and curiosity about the vastness and complexity of the universe we inhabit.

Top