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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.

Prefix: Undergrad

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Undergrad Is there a maximum mass limit for stars in the universe?

Feb 27, 2005 · Replies 4 · Feb 28, 2005

Replies: 4

Views: 10K

Undergrad Can we please look for 'New Earth' at Alpha Centauri?

Feb 26, 2005 · Replies 3 · Feb 27, 2005

Replies: 3

Views: 4K

Undergrad Calculating the Centre of Mass in a 2-Body System

Feb 26, 2005 · Replies 1 · Feb 26, 2005

Replies: 1

Views: 3K

Undergrad A body intermediate to stars and galaxies

Feb 20, 2005 · Replies 3 · Feb 24, 2005

Replies: 3

Views: 2K

Undergrad How is exoplanet mass found by astrometry?

Feb 23, 2005 · Replies 10 · Feb 23, 2005

Replies: 10

Views: 5K

Undergrad Let's think crack u'r brain with this qn.

Feb 19, 2005 · Replies 1 · Feb 19, 2005

Replies: 1

Views: 2K

Undergrad Is the Andromeda Galaxy going to collide with the Milky Way?

Feb 17, 2005 · Replies 9 · Feb 18, 2005

Replies: 9

Views: 8K

Undergrad Is There Evidence of Life on Mars?

Feb 16, 2005 · Replies 3 · Feb 17, 2005

Replies: 3

Views: 4K

Undergrad Help with planetary temp. equation

Feb 11, 2005 · Replies 7 · Feb 13, 2005

Replies: 7

Views: 3K

Undergrad Finding a Formula for Determining G Forces in Space Travel

Jan 22, 2005 · Replies 12 · Feb 11, 2005

Replies: 12

Views: 6K

Undergrad How Is Dark Matter So Hot Yet Invisible?

Feb 4, 2005 · Replies 10 · Feb 7, 2005

Replies: 10

Views: 3K

Undergrad The Big Splat: Origin of Our Moon

Feb 4, 2005 · Replies 3 · Feb 6, 2005

Replies: 3

Views: 5K

Undergrad ET Visitors: Scientists See High Likelihood

Jan 14, 2005 · Replies 22 · Feb 4, 2005

Replies: 22

Views: 4K

Undergrad What are the smallest orbital masses that can exist in space?

Jan 28, 2005 · Replies 16 · Jan 31, 2005

Replies: 16

Views: 4K

Undergrad Question regarding Supernova SN1987

Jan 30, 2005 · Replies 4 · Jan 31, 2005

Replies: 4

Views: 2K

Undergrad Was the sun ever a blue star in the early stages of its life?

Jan 28, 2005 · Replies 17 · Jan 30, 2005

Replies: 17

Views: 6K

Undergrad Save the Hubble: Unmanned Rocket Solution

Jan 22, 2005 · Replies 9 · Jan 29, 2005

Replies: 9

Views: 6K

Undergrad The largest explosion ever seen in space

Jan 6, 2005 · Replies 8 · Jan 27, 2005

Replies: 8

Views: 4K

Undergrad What Existed Before the Big Bang?

Jan 14, 2005 · Replies 28 · Jan 26, 2005

Replies: 28

Views: 11K

Undergrad Long Lost Star Catalog Found in Plain Sight

Jan 25, 2005 · Replies 2 · Jan 25, 2005

Replies: 2

Views: 3K

Undergrad Where are the solar systems like our own?

Jan 12, 2005 · Replies 5 · Jan 21, 2005

Replies: 5

Views: 3K

Undergrad Are Cosmic Rays Particles or Waves?

Jan 18, 2005 · Replies 12 · Jan 20, 2005

Replies: 12

Views: 3K

Undergrad Create Artificial Atmosphere: Pros & Cons

Jan 16, 2005 · Replies 2 · Jan 17, 2005

Replies: 2

Views: 5K

Undergrad Measuring the rotation speed of Io

Jan 16, 2005 · Replies 5 · Jan 17, 2005

Replies: 5

Views: 4K

Undergrad Doppler effect and color of stars

Jan 12, 2005 · Replies 10 · Jan 14, 2005

Replies: 10

Views: 9K

Undergrad Apogee & Perigee: What Does "a" Stand For?

Jan 11, 2005 · Replies 2 · Jan 11, 2005

Replies: 2

Views: 25K

Undergrad How Will the Universe End? Big Crunch Theory

Nov 22, 2004 · Replies 47 · Jan 8, 2005

2

Replies: 47

Views: 7K

Undergrad Big Bang: How Did the Energy Get There?

Jan 5, 2005 · Replies 9 · Jan 8, 2005

Replies: 9

Views: 3K

Undergrad Terrestrial, asteroidal and gaseous

Jan 5, 2005 · Replies 3 · Jan 7, 2005

Replies: 3

Views: 3K

Undergrad Pulsar Death: What Happens When a Pulsar Dies

Jan 1, 2005 · Replies 5 · Jan 4, 2005

Replies: 5

Views: 11K

Undergrad Investigating Solar Cycles and Their Effects

Jan 3, 2005 · Replies 1 · Jan 3, 2005

Replies: 1

Views: 2K

Undergrad Big Bang: Causes & Reasons Explained

Dec 29, 2004 · Replies 11 · Dec 30, 2004

Replies: 11

Views: 25K

Undergrad What Will Huygens Discover About Titan's Mysterious Atmosphere?

Dec 26, 2004 · Replies 4 · Dec 28, 2004

Replies: 4

Views: 3K

Undergrad Why Does Venus Rotate Differently?

Dec 26, 2004 · Replies 5 · Dec 27, 2004

Replies: 5

Views: 3K

Undergrad What is the concept of concentrated mass?

Dec 15, 2004 · Replies 4 · Dec 24, 2004

Replies: 4

Views: 16K

Undergrad Astronomers observe some galaxy

Dec 17, 2004 · Replies 6 · Dec 21, 2004

Replies: 6

Views: 2K

Undergrad 10^6 X stronger than Earth¹s lightning: Some of Cassini's findings discussed

Dec 20, 2004 · Replies 1 · Dec 21, 2004

Replies: 1

Views: 3K

Undergrad The Mystery of H- & HII Ions: Why the Balance Matters

Dec 14, 2004 · Replies 2 · Dec 16, 2004

Replies: 2

Views: 3K

Undergrad What is the relationship between luminosity and magnitude in stars?

Dec 8, 2004 · Replies 2 · Dec 12, 2004

Replies: 2

Views: 2K

Undergrad Include Sun's Diameter in Star Distance Measurement?

Dec 10, 2004 · Replies 2 · Dec 11, 2004

Replies: 2

Views: 2K

Undergrad Could Mars Bring Deadly Bugs to Earth?

Dec 10, 2004 · Replies 2 · Dec 10, 2004

Replies: 2

Views: 3K

Undergrad Are Black Holes Truly Infinite in Mass and Energy?

Nov 30, 2004 · Replies 3 · Dec 8, 2004

Replies: 3

Views: 3K

Undergrad Why Do Stars Turn Red Giants as They Age?

Dec 8, 2004 · Replies 3 · Dec 8, 2004

Replies: 3

Views: 9K

Undergrad What Occurs First: Nuclear Fusion or Fission in a Star?

Dec 4, 2004 · Replies 10 · Dec 6, 2004

Replies: 10

Views: 5K

Undergrad Sending space probes to other planets

Dec 5, 2004 · Replies 5 · Dec 6, 2004

Replies: 5

Views: 5K

Undergrad Why can you see white through H-alpha filter?

Nov 28, 2004 · Replies 9 · Dec 5, 2004

Replies: 9

Views: 4K

Undergrad What Would Happen If the Moon Entered Earth's Atmosphere?

Dec 4, 2004 · Replies 2 · Dec 4, 2004

Replies: 2

Views: 11K

Undergrad Inverse Square Law - Is It Valid for Quasars?

Nov 30, 2004 · Replies 8 · Dec 3, 2004

Replies: 8

Views: 4K

Undergrad Kepler's Laws and altitude of orbit

Sep 22, 2004 · Replies 28 · Dec 2, 2004

Replies: 28

Views: 22K

Undergrad Formation of Black Holes from Neutron Stars and White Dwarfs

May 29, 2004 · Replies 46 · Dec 1, 2004

2

Replies: 46

Views: 18K

Undergrad Hubble's law- little bit of help

Oct 29, 2004 · Replies 7 · Nov 30, 2004

Replies: 7

Views: 5K

Undergrad If Sun = 98% H & He, why continuous spectrum?

Nov 28, 2004 · Replies 16 · Nov 29, 2004

Replies: 16

Views: 19K

Undergrad Can Distant Stars Fill the Universe with Photons?

Nov 24, 2004 · Replies 10 · Nov 25, 2004

Replies: 10

Views: 4K

Undergrad How Can I Effectively Investigate Meteor Impact Crater Formation?

Oct 21, 2004 · Replies 8 · Nov 24, 2004

Replies: 8

Views: 4K

Undergrad Best way to get 'learn' Astrophysics

Nov 23, 2004 · Replies 1 · Nov 23, 2004

Replies: 1

Views: 7K

Undergrad Star Cluster Gravity: Impact on Forces

Nov 21, 2004 · Replies 4 · Nov 22, 2004

Replies: 4

Views: 4K

Undergrad Orbital Motion Help: Calculate Altitude of Spacecraft

Nov 16, 2004 · Replies 4 · Nov 17, 2004

Replies: 4

Views: 4K

Undergrad Unraveling the Mysteries of Black Holes: Finite or Infinite Mass?

Nov 14, 2004 · Replies 11 · Nov 16, 2004

Replies: 11

Views: 4K

Undergrad Universe is expanding faster than the speed of light

Nov 13, 2004 · Replies 2 · Nov 13, 2004

Replies: 2

Views: 2K

Undergrad Need help locating pulsar CP1133

Nov 9, 2004 · Replies 3 · Nov 10, 2004

Replies: 3

Views: 3K

Undergrad How Do Objects Move Near the Galactic Center?

Mar 5, 2004 · Replies 21 · Nov 8, 2004

Replies: 21

Views: 5K

Undergrad How can I start studying astrophysics without a physics degree?

Nov 8, 2004 · Replies 1 · Nov 8, 2004

Replies: 1

Views: 3K

Undergrad Explain to me the concept of space time?

Nov 4, 2004 · Replies 3 · Nov 6, 2004

Replies: 3

Views: 3K

Undergrad Movie of stars orbiting a black hole

Oct 12, 2004 · Replies 3 · Nov 4, 2004

Replies: 3

Views: 18K

Undergrad Calculating Mass of a Black Hole: A Primer

Oct 31, 2004 · Replies 7 · Nov 1, 2004

Replies: 7

Views: 5K

Undergrad Grav Sling Shot: Understanding Inelastic Collisions w/o Contact Forces

Oct 28, 2004 · Replies 1 · Oct 28, 2004

Replies: 1

Views: 2K

Undergrad Who is rotating around whom in the solar system?

Oct 23, 2004 · Replies 8 · Oct 26, 2004

Replies: 8

Views: 4K

Undergrad Can planets exist around twin or triple-star systems?

Oct 23, 2004 · Replies 7 · Oct 23, 2004

Replies: 7

Views: 4K

Undergrad Why doesn't the orbit increase in radius?

Oct 8, 2004 · Replies 4 · Oct 23, 2004

Replies: 4

Views: 3K

Undergrad Is the Universe Curved or Flat and How Does It Affect Energy?

Oct 21, 2004 · Replies 5 · Oct 22, 2004

Replies: 5

Views: 3K

Undergrad Can a Planet Turn into a Star through Gas Accumulation?

Oct 21, 2004 · Replies 1 · Oct 21, 2004

Replies: 1

Views: 11K

Undergrad Space Expansion: Earth-Sun, Nucleus-Electron?

Oct 10, 2004 · Replies 11 · Oct 20, 2004

Replies: 11

Views: 4K

Undergrad Conditions for 2 Elliptical Orbits w/ Same Peri/Aphelion

Oct 19, 2004 · Replies 1 · Oct 19, 2004

Replies: 1

Views: 4K

Undergrad The Universe is expanding Right?

Sep 8, 2004 · Replies 25 · Oct 19, 2004

Replies: 25

Views: 8K

Undergrad What is the value of Mu needed for orbit calculations in the Earth-moon system?

Oct 14, 2004 · Replies 1 · Oct 15, 2004

Replies: 1

Views: 5K

Undergrad How does velocity affects the shape of orbit

Oct 13, 2004 · Replies 2 · Oct 14, 2004

Replies: 2

Views: 15K

Undergrad What Determines a Star's Life Expectancy?

Oct 8, 2004 · Replies 9 · Oct 11, 2004

Replies: 9

Views: 7K

Undergrad History of Universe (Baez timeline)

Sep 30, 2004 · Replies 8 · Oct 8, 2004

Replies: 8

Views: 5K

Undergrad Why is the sun's surface so cool?

Oct 7, 2004 · Replies 11 · Oct 8, 2004

Replies: 11

Views: 11K

Undergrad We always see the same side of the moon

Oct 4, 2004 · Replies 3 · Oct 6, 2004

Replies: 3

Views: 8K

Undergrad Satellite Orbits: Meteostat Geostationary Orbit Explained

Sep 29, 2004 · Replies 4 · Oct 2, 2004

Replies: 4

Views: 3K

Undergrad What Is the Frame of Reference for Measuring Velocity?

Sep 23, 2004 · Replies 22 · Sep 29, 2004

Replies: 22

Views: 4K

Undergrad Powered Flight from Earth to Mars - Find Help Here

Sep 25, 2004 · Replies 3 · Sep 26, 2004

Replies: 3

Views: 2K

Undergrad Moon Moving Away: Why is it Increasing?

Sep 24, 2004 · Replies 2 · Sep 24, 2004

Replies: 2

Views: 3K

Undergrad Understanding Angular Size: Tips for Determining Object Dimensions

Sep 23, 2004 · Replies 2 · Sep 24, 2004

Replies: 2

Views: 5K

Undergrad Why do stars emit electromagnetic waves?

Aug 25, 2004 · Replies 14 · Sep 22, 2004

Replies: 14

Views: 12K

Undergrad What is the energy of the combined body after the collision?

Sep 22, 2004 · Replies 9 · Sep 22, 2004

Replies: 9

Views: 3K

Undergrad How can we study the composition of the Sun and Jupiter without direct samples?

Sep 13, 2004 · Replies 7 · Sep 15, 2004

Replies: 7

Views: 7K

Undergrad Space vs Energy: Can Volume Exist Without Energy?

Sep 5, 2004 · Replies 36 · Sep 14, 2004

2

Replies: 36

Views: 5K

Undergrad Are Cosmic Rays Particles or Radiation?

Sep 7, 2004 · Replies 2 · Sep 7, 2004

Replies: 2

Views: 5K

Undergrad Universe Expansion Speed: Einstein's Theory Impacted?

Apr 13, 2004 · Replies 20 · Sep 7, 2004

Replies: 20

Views: 4K

Undergrad Cosmic background radiation - alternative proposal

Mar 14, 2004 · Replies 55 · Sep 7, 2004

2

Replies: 55

Views: 13K

Undergrad What is the formula for calculating delta v for escape velocity?

Sep 5, 2004 · Replies 3 · Sep 5, 2004

Replies: 3

Views: 23K

Undergrad Chances of aliens finding Earth disappearing

Aug 10, 2004 · Replies 18 · Sep 5, 2004

Replies: 18

Views: 4K

Undergrad Black Hole Implosion or Supernova Explosion - Which is More Powerful?

Jul 8, 2004 · Replies 6 · Sep 5, 2004

Replies: 6

Views: 4K

Undergrad Strange SETI Signal from ~1000 LY

Sep 1, 2004 · Replies 9 · Sep 4, 2004

Replies: 9

Views: 6K

Undergrad How Fast Is the Milky Way Moving Relative to the Cosmic Background Radiation?

Sep 4, 2004 · Replies 3 · Sep 4, 2004

Replies: 3

Views: 5K

Undergrad Could Geostationary Satellites End Up Gathering Over the Indian Ocean?

Aug 6, 2004 · Replies 11 · Sep 4, 2004

Replies: 11

Views: 6K

Undergrad Elliptical Orbits: How They Work & Math Behind Them

Sep 3, 2004 · Replies 1 · Sep 3, 2004

Replies: 1

Views: 3K

Undergrad Elliptical Orbits: Simple Explination & Gaining Energy

Sep 1, 2004 · Replies 9 · Sep 2, 2004

Replies: 9

Views: 6K

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.

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