Ask an Astronomer Team

Kristine Spekkens

Kristine studies the dynamics of galaxies and what they can teach us about dark matter in the universe. She got her Ph.D from Cornell in August 2005, was a Jansky post-doctoral fellow at Rutgers University from 2005-2008, and is now a faculty member at the Royal Military College of Canada and at Queen's University.

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Display # 
Title Created Date Hits
How does the Moon stay "suspended" in the air? (Intermediate) Apr 05 115616
Would the biggest airplanes cause tsunamis if they crashed? (Intermediate) Feb 05 44114
Do we really observe the edges of galaxies at different epochs? (Advanced) Oct 04 37993
Do the Sun's or Earth's magnetic field reverse? (Intermediate) Jan 04 56122
When are there 5 Sundays in February? (Intermediate) Jan 04 55474
Are names given to black holes? (Advanced) Dec 03 77194
How can we find galaxies behind the Milky Way? (Intermediate) Sep 03 72988
Can I communicate faster than light? (Advanced) Aug 03 61231
Is there such a thing as hyperspace? (Intermediate) May 03 43065
How do we know that sunspots are associated with the Sun's magnetic field? (Intermediate) Apr 03 46083
Does inflation allow for an infinite number of universes? (Advanced) Apr 03 37991
What is the origin of the stellar classification system "OBAFGKM"? (Intermediate) Mar 03 53029
How are planets affected by the Hot Ionised Medium? (Advanced) Mar 03 29954
Why don't people walk upside-down on the bottom of the Earth? (Beginner) Mar 03 118727
How long has humanity known that we live in a galaxy similar to others in the Universe? (Intermediate) Feb 03 37339
How are galaxy distances inferred from their recessional velocities? (Intermediate) Jan 03 56234
Did I really hear a meteor? (Intermediate) Jan 03 45299
Do we have to worry about relativity when studying galactic objects? (Intermediate) Jan 03 34431
Does the temperature of matter increase as it is accelerated to relativistic speeds? (Advanced) Dec 02 40640
How do sunrise and sunset times change with altitude? (Intermediate) Nov 02 73233
How do we know what parameters to use when simulating the collision of the Milky Way and Andromeda? (Advanced) Nov 02 45682
Can we look back far enough in time to see the Big Bang? (Beginner) Nov 02 80138
How can the Universe expand faster than the speed of light during inflation? (Advanced) Nov 02 109690
Why is pressure broadening greater in low mass stars than in high mass stars? (Advanced) Nov 02 35759
Why is sea water salty, and not lake water? (Beginner) Nov 02 63837
How many moles of stars are in the known universe? (Beginner) Oct 02 52450
Do binary or triple star systems form together? (Intermediate) Oct 02 36194
Why doesn't dark matter fall into a black hole? (Advanced) Oct 02 63746
Where does the kinetic energy of infalling bodies come from? (Intermediate) Oct 02 39413
Can astronomers observe anything when the moon is full? (Beginner) Oct 02 37875
Is there a beginning and an end to a galaxy's life? (Intermediate) Oct 02 65419
What was that really big falling star that I saw? (Intermediate) Oct 02 53132
How do you calculate the azimuth and altitude of an object? (Intermediate) Oct 02 94998
Is the Moon seen as a crescent (and not a "boat") all over the world? Is the same phase of the moon visible from the Northern and Southern hemispheres? (Advanced) Oct 02 99906
Why are the Moon and Sun sometimes orange or red? (Beginner) Sep 02 318776
What is the origin of spiral structure in galaxies? (Intermediate) Sep 02 79879
Why does the Sun appear larger on the horizon than overhead? (Intermediate) Sep 02 89924
Can I see details on Venus? (Intermediate) Sep 02 49629
Do the magnitudes and colors of stars ever change? (Intermediate) Sep 02 48159
Why was the Platonic year named after Plato? (Intermediate) Aug 02 42378
Can I calculate the size of the Universe by converting light years to kilometres? (Intermediate) Aug 02 67511
Can the acceleration of the Universe be analogous to apparent acceleration in a airplane? (Intermediate) Aug 02 57146
Why do photos of space taken from space never show any stars? (Intermediate) Aug 02 48983
Is the Earth at the centre of the Universe? (Intermediate) Aug 02 56719
How can a star burn with no oxygen? (Beginner) Jul 02 181852
How are galaxies and solar systems similar? (Advanced) Jul 02 54839
Do supermassive black holes cause galaxy rotation? (Advanced) Jul 02 88832
What causes a particle to decay? (Intermediate) Jul 02 40824
Who (and when) discovered that the earth's axis is on a 23 degree tilt? (Intermediate) Jul 02 74435
Why do pictures of distant galaxies have higher resolution than those of nearby planets? (Intermediate) Jun 02 60277
How is the Cepheid yardstick validated? (Advanced) Jun 02 41818
What would happen if you went back in time and killed your grandmother? (Beginner) Jun 02 38905
What colors are visible through an amateur telescope? (Intermediate) Jun 02 52645
What elements make up the Sun? (Beginner) Jun 02 153124
Is it possible to measure the temperature of the Sun? (Beginner) May 02 117952

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