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.
- · Replies 10 ·
- · Replies 3 ·
- · Replies 55 ·
High School
Is Dark Matter a solid, gas or liquid?
- · Replies 23 ·
High School
Understanding Life Support Systems
- · Replies 11 ·
High School
Stargazing 101: Adjusting for Hemisphere
- · Replies 1 ·
High School
Question about infinite space and time
- · Replies 1 ·
- · Replies 3 ·
- · Replies 4 ·
- · Replies 4 ·
- · Replies 2 ·
High School
Could I Have Seen the Horsehead?
- · Replies 5 ·
- · Replies 8 ·
High School
What would make a star flash red and blue?
- · Replies 1 ·
High School
What Did We Find on Titan?
- · Replies 8 ·
- · Replies 4 ·
High School
Q&A on Orbits: Throwing Balls in Space
- · Replies 6 ·
- · Replies 17 ·
High School
How do we know the size of these suns?
- · Replies 5 ·
High School
How to calculate the momentum of Pluto?
- · Replies 6 ·
High School
Gregorian calendar off by 26 seconds a year
- · Replies 3 ·
High School
Math and Distance: How Far is Pluto from Earth?
- · Replies 4 ·
- · Replies 9 ·
High School
Can a star drift through intergalactic space?
- · Replies 2 ·
High School
Distance from low earth orbit to Europa?
- · Replies 1 ·
High School
Do the planets revolve on a 2d plane?
- · Replies 5 ·
- · Replies 1 ·
High School
How to Set Up an Online Observatory?
- · Replies 1 ·
- · Replies 1 ·
High School
What is space, vaccuum, or nonexistence?
- · Replies 79 ·
High School
A question about the Satturn rings.
- · Replies 4 ·
High School
High school sophomore interested in Astrophysics
- · Replies 11 ·
High School
Is the sky map for Comet Holmes accurate?
- · Replies 16 ·
High School
What Are Population I and Population II Stars?
- · Replies 3 ·
High School
Ancient calculations and observations
- · Replies 4 ·
- · Replies 2 ·
- · Replies 11 ·
High School
Son's: Seeing Objects from Earth
- · Replies 17 ·
- · Replies 2 ·
High School
Beginners Questions about Astronomy
- · Replies 6 ·
- · Replies 33 ·
- · Replies 1 ·
High School
Agol, Interesting objects in Perseus.
- · Replies 5 ·
- · Replies 3 ·
- · Replies 2 ·
High School
Is the Milky Way Really a Spiral Galaxy?
- · Replies 2 ·
- · Replies 4 ·
High School
Matter & Space: Interaction & Occupancy
- · Replies 4 ·
- · Replies 2 ·
High School
Does a Black hole emit anything?
- · Replies 1 ·
High School
Why do planets revolve in elliptical orbits?
- · Replies 2 ·
- · Replies 7 ·
High School
Does a planets orbit ever go chaotic?
- · Replies 5 ·
- · Replies 10 ·
- · Replies 5 ·
- · Replies 11 ·
- · Replies 3 ·
High School
Global warming and solar actvities
- · Replies 2 ·
- · Replies 9 ·
High School
Discovering the Sun's New Twin: HD 101364
- · Replies 5 ·
High School
Gravity in Space: Why is Zero Gravity?
- · Replies 1 ·
- · Replies 3 ·
High School
Distance from Sun to outside galaxy?
- · Replies 6 ·
- · Replies 10 ·
- · Replies 3 ·
- · Replies 2 ·
- · Replies 3 ·
High School
Request: comet projectory calculating tool
- · Replies 4 ·
- · Replies 4 ·
- · Replies 1 ·
High School
Why does planets hav eliptical orbits
- · Replies 2 ·
- · Replies 1 ·
High School
Toys in Space: Designing for Astronauts
- · Replies 12 ·
- · Replies 7 ·
- · Replies 11 ·
- · Replies 3 ·
- · Replies 5 ·
- · Replies 3 ·
High School
Is the Sun an Ordinary or Atypical Star?
- · Replies 2 ·
High School
How Stars are Formed - Astronomy Basics
- · Replies 2 ·
- · Replies 6 ·
High School
What can I see with my Sky Watcher telescope?
- · Replies 6 ·
High School
Taking Pictures From Outer Space: Color or B&W?
- · Replies 4 ·
High School
Why the Moon Doesn't Fall on the Earth
- · Replies 15 ·
High School
Full Moon Height: When is It Highest?
- · Replies 4 ·
High School
Liftoff for Ceres and Vesta (July 2007)
- · Replies 7 ·
High School
Mirror Grinding Kits: Wave Aspect Explained
- · Replies 11 ·
- · Replies 5 ·
- · Replies 4 ·
- · Replies 9 ·
- · Replies 2 ·
- · Replies 3 ·
- · Replies 2 ·
High School
What Can I See with My Telescope in Boston?
- · Replies 11 ·
- · Replies 12 ·
- · Replies 3 ·
High School
Maximum number of orbiting planets
- · Replies 3 ·
High School
Signal Transmission from Mars to Earth
- · Replies 4 ·
High School
Universe Expansion: How Fast Is It?
- · Replies 2 ·