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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 Energy Density of a magnetic field

Jan 24, 2012 · Replies 1 · Jan 24, 2012

Replies: 1

Views: 21K

Undergrad Expansion and Contraction of Universe

Jan 2, 2012 · Replies 30 · Jan 22, 2012

2

Replies: 30

Views: 10K

Undergrad Space Freighters: Can Containers Take Off & Land Themselves?

Jan 19, 2012 · Replies 17 · Jan 22, 2012

Replies: 17

Views: 5K

Undergrad Why Are Giant Stars So Low in Density?

Jan 6, 2012 · Replies 6 · Jan 21, 2012

Replies: 6

Views: 8K

Undergrad Goldilocks Zone: A Widened Definition

Jan 13, 2012 · Replies 10 · Jan 21, 2012

Replies: 10

Views: 4K

Undergrad Can Spider Silk Be Used As Space Tethers?

Jan 18, 2012 · Replies 4 · Jan 19, 2012

Replies: 4

Views: 4K

Undergrad Astrometeorology: A real science?

Aug 26, 2008 · Replies 20 · Jan 19, 2012

Replies: 20

Views: 14K

Undergrad Are Black Holes Real Holes or Just Theoretical Constructs?

Jul 9, 2011 · Replies 23 · Jan 18, 2012

Replies: 23

Views: 9K

Undergrad Questions concerning hypervelocity stars

Dec 25, 2011 · Replies 9 · Jan 18, 2012

Replies: 9

Views: 6K

Undergrad Calculating the period of an orbit

Jan 15, 2012 · Replies 4 · Jan 16, 2012

Replies: 4

Views: 3K

Undergrad Calculating Energy of Separating Stars: Potential vs Kinetic Energy

Jan 15, 2012 · Replies 3 · Jan 15, 2012

Replies: 3

Views: 2K

Undergrad Expanding Universe-Colliding Galaxies?

Jan 10, 2012 · Replies 4 · Jan 14, 2012

Replies: 4

Views: 3K

Undergrad Gravity and space curvature confusion

Jan 9, 2012 · Replies 10 · Jan 13, 2012

Replies: 10

Views: 3K

Undergrad Orbit to the Moon: nodes position

Jan 6, 2012 · Replies 8 · Jan 10, 2012

Replies: 8

Views: 5K

Undergrad How Long Do Red Giant Stars Last?

Jan 9, 2012 · Replies 3 · Jan 9, 2012

Replies: 3

Views: 17K

Undergrad What Is Galaxy 'Completeness'?

Dec 28, 2011 · Replies 3 · Jan 8, 2012

Replies: 3

Views: 6K

Undergrad L-LOG-SUN - value on stellar data

Jan 5, 2012 · Replies 1 · Jan 8, 2012

Replies: 1

Views: 2K

Undergrad Why are the colours of nebulae different?

Jan 8, 2012 · Replies 3 · Jan 8, 2012

Replies: 3

Views: 3K

Undergrad Valles Marineras Origin and Origin of Asteroid Belt Linked?

Dec 27, 2011 · Replies 5 · Jan 7, 2012

Replies: 5

Views: 6K

Undergrad Are singularities shaped as a sphere.

Jan 4, 2012 · Replies 6 · Jan 6, 2012

Replies: 6

Views: 3K

Undergrad What elements make up the core of a dying star?

Jan 1, 2012 · Replies 13 · Jan 5, 2012

Replies: 13

Views: 6K

Undergrad Grail Mission to the Moon: Does Light Exert Pressure?

Dec 31, 2011 · Replies 2 · Jan 5, 2012

Replies: 2

Views: 4K

Undergrad When Will the Andromeda and Milky Way Galaxies Merge and Could it Support Life?

Nov 24, 2011 · Replies 18 · Jan 5, 2012

Replies: 18

Views: 8K

Undergrad Neutron Star or a Pulsar - what decides

Dec 15, 2011 · Replies 5 · Jan 4, 2012

Replies: 5

Views: 4K

Undergrad Where can I find a comprehensive online database for stellar data analysis?

Dec 29, 2011 · Replies 5 · Jan 2, 2012

Replies: 5

Views: 4K

Undergrad Type IV Civilizations - Info & References

Mar 18, 2004 · Replies 4 · Jan 1, 2012

Replies: 4

Views: 10K

Undergrad Position of a Body on a Hyperbolic/Parabolic Orbit with Respect to Time

Dec 29, 2011 · Replies 4 · Dec 30, 2011

Replies: 4

Views: 7K

Undergrad Please explain Dopler effect of light

Dec 24, 2011 · Replies 6 · Dec 29, 2011

Replies: 6

Views: 4K

Undergrad Angle of crab pulsar to the ecliptic

Dec 22, 2011 · Replies 5 · Dec 28, 2011

Replies: 5

Views: 4K

Poll

Undergrad Do we want to sent probe to Newly discovered planet 'Kepler-22b' now?

Dec 10, 2011 · Replies 18 · Dec 25, 2011

Replies: 18

Views: 9K

Undergrad What is the efficiency of solar energy in geosynchronous orbit?

Dec 22, 2011 · Replies 19 · Dec 25, 2011

Replies: 19

Views: 10K

Undergrad The meaning of z number in red shift

Dec 20, 2011 · Replies 7 · Dec 23, 2011

Replies: 7

Views: 4K

Undergrad Why does Venus have an atmosphere?

Jul 14, 2011 · Replies 19 · Dec 22, 2011

Replies: 19

Views: 17K

Undergrad Life on Europa vs. Jupiter's Electromagnetic field

Dec 20, 2011 · Replies 11 · Dec 22, 2011

Replies: 11

Views: 5K

Undergrad Why is Venus's atmosphere so hot?

Jun 28, 2008 · Replies 34 · Dec 20, 2011

2

Replies: 34

Views: 17K

Undergrad Are Black Holes Proven or Just Theoretical Constructs?

Dec 14, 2011 · Replies 36 · Dec 18, 2011

2

Replies: 36

Views: 10K

Undergrad Is Black Hole Gravity Strong Enough to Crush Earth into a Watermelon?

Dec 16, 2011 · Replies 2 · Dec 16, 2011

Replies: 2

Views: 4K

Undergrad Can Scientists Capture Images of Distant Stars Like Betelgeuse?

Dec 14, 2011 · Replies 6 · Dec 16, 2011

Replies: 6

Views: 3K

Undergrad Neutron star and white dwarf material

Dec 14, 2011 · Replies 9 · Dec 15, 2011

Replies: 9

Views: 4K

Undergrad If you leave Earth traveling at .01c can you reach Saturn in 6 days?

Dec 15, 2011 · Replies 2 · Dec 15, 2011

Replies: 2

Views: 3K

Undergrad I think the universe is slowing down not speeding up

Dec 3, 2011 · Replies 12 · Dec 14, 2011

Replies: 12

Views: 5K

Undergrad Could Telescopes Ever Capture Detailed Images of Exoplanet Surfaces?

Dec 3, 2011 · Replies 19 · Dec 13, 2011

Replies: 19

Views: 10K

Undergrad AU and the Circumstellar Habitable Zone

Dec 12, 2011 · Replies 2 · Dec 13, 2011

Replies: 2

Views: 3K

Undergrad What Happens When Two Black Holes Collide?

Oct 28, 2011 · Replies 6 · Dec 12, 2011

Replies: 6

Views: 4K

Undergrad Highest Star Core Temperature: Does Size Matter?

Dec 9, 2011 · Replies 8 · Dec 11, 2011

Replies: 8

Views: 19K

Undergrad Half Light Speed Probes: See What Earth Sees

Dec 8, 2011 · Replies 3 · Dec 8, 2011

Replies: 3

Views: 3K

Undergrad Impact & Gravitational Effects of Asteroids/Comets on Moons Orbit

Dec 6, 2011 · Replies 8 · Dec 8, 2011

Replies: 8

Views: 3K

Undergrad Problem understanding NBody simulation physics

Dec 7, 2011 · Replies 3 · Dec 7, 2011

Replies: 3

Views: 3K

Undergrad Does Our Milky Way Stir Up Solar System Collisions?

Dec 6, 2011 · Replies 1 · Dec 6, 2011

Replies: 1

Views: 3K

Undergrad What Causes Time Dilation on Mars?

Nov 24, 2011 · Replies 11 · Dec 6, 2011

Replies: 11

Views: 6K

Undergrad Could a Black Hole Be 10 Billion Times Larger Than the Sun?

Dec 5, 2011 · Replies 1 · Dec 5, 2011

Replies: 1

Views: 2K

Undergrad Using Rspec to Interpret Stellar Spectra

Dec 3, 2011 · Replies 4 · Dec 4, 2011

Replies: 4

Views: 3K

Undergrad How Were Daily and Annual Cycles Explained Before Copernicus?

Dec 4, 2011 · Replies 2 · Dec 4, 2011

Replies: 2

Views: 3K

Undergrad First post ever. Be Kind. Solar orbit questions

Nov 29, 2011 · Replies 8 · Dec 2, 2011

Replies: 8

Views: 3K

Undergrad Parallax formula derivation problem?

Nov 27, 2011 · Replies 1 · Nov 29, 2011

Replies: 1

Views: 6K

Undergrad Singularity in Astrophysics: Meaning & Etymology

Nov 16, 2011 · Replies 14 · Nov 25, 2011

Replies: 14

Views: 7K

Undergrad A question about star's luminosity, temperature and mass.

Mar 20, 2008 · Replies 33 · Nov 24, 2011

2

Replies: 33

Views: 21K

Undergrad How sure can we be of the distances in the solar system?

Nov 22, 2011 · Replies 2 · Nov 22, 2011

Replies: 2

Views: 3K

Undergrad What was the first mineral formed in the universe?

Nov 6, 2011 · Replies 7 · Nov 22, 2011

Replies: 7

Views: 9K

Undergrad Birth of a Planet: The Formation & Heavy Elements

Oct 29, 2011 · Replies 2 · Nov 21, 2011

Replies: 2

Views: 3K

Undergrad Thanks for the interesting article.

Nov 18, 2011 · Replies 6 · Nov 20, 2011

Replies: 6

Views: 4K

Undergrad How much did Earth's gravity alter the course of 2005 YU55?

Nov 11, 2011 · Replies 24 · Nov 19, 2011

Replies: 24

Views: 9K

Undergrad Is the Notion of Public Space a Myth?

Nov 13, 2011 · Replies 35 · Nov 18, 2011

2

Replies: 35

Views: 7K

Undergrad What causes this shell of light around the Earth in this vedio?

Nov 16, 2011 · Replies 8 · Nov 18, 2011

Replies: 8

Views: 3K

Undergrad How long would daylight last on Earth if the sun disappeared?

Nov 14, 2005 · Replies 30 · Nov 17, 2011

2

Replies: 30

Views: 14K

Undergrad Astrobiology Missions, whats being proposed?

Nov 16, 2011 · Replies 3 · Nov 16, 2011

Replies: 3

Views: 3K

Undergrad Can variable stars become quickly non variable and viceversa?

Nov 11, 2011 · Replies 6 · Nov 13, 2011

Replies: 6

Views: 4K

Undergrad Earth and Moon Orbits Aligned: Consequences?

Nov 12, 2011 · Replies 3 · Nov 13, 2011

Replies: 3

Views: 2K

Undergrad Could women be better suited for long distance space travel?

Nov 4, 2011 · Replies 48 · Nov 12, 2011

2

Replies: 48

Views: 14K

Undergrad Which elements/compounds can be liquid on Venus?

Nov 8, 2011 · Replies 3 · Nov 10, 2011

Replies: 3

Views: 5K

Undergrad Measurement of Galaxy Rotation: How Long Does it Take?

Nov 7, 2011 · Replies 4 · Nov 8, 2011

Replies: 4

Views: 3K

Undergrad How feasible you think Nemesis theory is

Jan 24, 2009 · Replies 5 · Nov 7, 2011

Replies: 5

Views: 5K

Undergrad Possible energy sources that a lunar base might have as an option

Nov 3, 2011 · Replies 4 · Nov 4, 2011

Replies: 4

Views: 4K

Undergrad Are orbital planes generally parallel on large scales?

Nov 3, 2011 · Replies 3 · Nov 4, 2011

Replies: 3

Views: 4K

Undergrad The size of the universe, and what we can see.

Oct 25, 2011 · Replies 4 · Nov 2, 2011

Replies: 4

Views: 4K

Undergrad Why aren't stars in a star cluster attracted to each other?

Oct 27, 2011 · Replies 25 · Nov 2, 2011

Replies: 25

Views: 9K

Undergrad Will Pluto Crash into Neptune?

Oct 8, 2011 · Replies 8 · Nov 1, 2011

Replies: 8

Views: 15K

Undergrad Gravitational Lenses & Light Frequency: Same or Different?

Oct 31, 2011 · Replies 1 · Oct 31, 2011

Replies: 1

Views: 3K

Undergrad How to simulate planets orbit curce around the sun ?

Oct 28, 2011 · Replies 36 · Oct 31, 2011

2

Replies: 36

Views: 23K

Undergrad Formation/Expansion of Red Giant

Oct 25, 2011 · Replies 3 · Oct 31, 2011

Replies: 3

Views: 5K

Undergrad What is the estimated energy output of the Milky Way?

Oct 30, 2011 · Replies 1 · Oct 30, 2011

Replies: 1

Views: 3K

Undergrad Why are galaxies shaped like spirals?

Oct 29, 2011 · Replies 1 · Oct 29, 2011

Replies: 1

Views: 3K

Undergrad What are some applications of lasers in astrophysics research?

Oct 24, 2011 · Replies 7 · Oct 29, 2011

Replies: 7

Views: 4K

Undergrad Star to black hole same mass/gravity?

Oct 27, 2011 · Replies 4 · Oct 28, 2011

Replies: 4

Views: 4K

Undergrad Questions about Galactic Rotation

Oct 22, 2011 · Replies 11 · Oct 28, 2011

Replies: 11

Views: 5K

Undergrad What is the Smallest Possible Size of a Black Hole?

Oct 27, 2011 · Replies 9 · Oct 28, 2011

Replies: 9

Views: 5K

Undergrad Is Gliese 581d a Goldilocks planet?

May 17, 2011 · Replies 52 · Oct 28, 2011

2

Replies: 52

Views: 12K

Undergrad Why most of the galaxies are having two spiral arms only?

Oct 24, 2011 · Replies 5 · Oct 25, 2011

Replies: 5

Views: 3K

Undergrad Does the Universe Have a Center of Mass and Why Is It Expanding?

Oct 15, 2011 · Replies 26 · Oct 23, 2011

Replies: 26

Views: 8K

Undergrad Understanding Very Long Baseline Interferometry: Is the Formula the Same as #2?

Oct 15, 2011 · Replies 6 · Oct 22, 2011

Replies: 6

Views: 4K

Undergrad Our solar system and center of Milky way

Oct 18, 2011 · Replies 7 · Oct 20, 2011

Replies: 7

Views: 9K

Undergrad Need a good textbook for astrophysics

Oct 20, 2011 · Replies 1 · Oct 20, 2011

Replies: 1

Views: 3K

Undergrad Is Hubble Constant Really Constant?

Oct 18, 2011 · Replies 5 · Oct 19, 2011

Replies: 5

Views: 3K

Undergrad Newtons of an exploding Supernova

Oct 6, 2011 · Replies 14 · Oct 19, 2011

Replies: 14

Views: 10K

Undergrad Could an all water planet theorhetically exist?

Oct 12, 2011 · Replies 20 · Oct 18, 2011

Replies: 20

Views: 9K

Undergrad Converting RA & Dec into Normal Earth Surface Latitude & Longitude

Oct 10, 2011 · Replies 14 · Oct 17, 2011

Replies: 14

Views: 13K

Undergrad Why Does Lithium Stay on the Surface of the Sun?

Oct 13, 2011 · Replies 4 · Oct 15, 2011

Replies: 4

Views: 5K

Undergrad Force that the Earth exerts on the Moon

Oct 12, 2011 · Replies 7 · Oct 14, 2011

Replies: 7

Views: 5K

Undergrad How do neutrinos behave near a black hole?

Oct 9, 2011 · Replies 5 · Oct 9, 2011

Replies: 5

Views: 5K

Undergrad Should space exploration be only the developed world’s adventure?

Jul 11, 2011 · Replies 113 · Oct 8, 2011

4

Replies: 113

Views: 20K

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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