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 185868
Would the biggest airplanes cause tsunamis if they crashed? (Intermediate) Feb 05 71286
Do we really observe the edges of galaxies at different epochs? (Advanced) Oct 04 73557
Do the Sun's or Earth's magnetic field reverse? (Intermediate) Jan 04 86446
When are there 5 Sundays in February? (Intermediate) Jan 04 93351
Are names given to black holes? (Advanced) Dec 03 111819
How can we find galaxies behind the Milky Way? (Intermediate) Sep 03 102686
Can I communicate faster than light? (Advanced) Aug 03 94895
Is there such a thing as hyperspace? (Intermediate) May 03 69519
How do we know that sunspots are associated with the Sun's magnetic field? (Intermediate) Apr 03 78035
Does inflation allow for an infinite number of universes? (Advanced) Apr 03 66220
What is the origin of the stellar classification system "OBAFGKM"? (Intermediate) Mar 03 95588
How are planets affected by the Hot Ionised Medium? (Advanced) Mar 03 52667
Why don't people walk upside-down on the bottom of the Earth? (Beginner) Mar 03 244906
How long has humanity known that we live in a galaxy similar to others in the Universe? (Intermediate) Feb 03 65656
How are galaxy distances inferred from their recessional velocities? (Intermediate) Jan 03 102524
Did I really hear a meteor? (Intermediate) Jan 03 76714
Do we have to worry about relativity when studying galactic objects? (Intermediate) Jan 03 61213
Does the temperature of matter increase as it is accelerated to relativistic speeds? (Advanced) Dec 02 72031
How do sunrise and sunset times change with altitude? (Intermediate) Nov 02 136905
How do we know what parameters to use when simulating the collision of the Milky Way and Andromeda? (Advanced) Nov 02 77971
Can we look back far enough in time to see the Big Bang? (Beginner) Nov 02 135120
How can the Universe expand faster than the speed of light during inflation? (Advanced) Nov 02 171654
Why is pressure broadening greater in low mass stars than in high mass stars? (Advanced) Nov 02 60035
Why is sea water salty, and not lake water? (Beginner) Nov 02 115480
How many moles of stars are in the known universe? (Beginner) Oct 02 84500
Do binary or triple star systems form together? (Intermediate) Oct 02 66997
Why doesn't dark matter fall into a black hole? (Advanced) Oct 02 92025
Where does the kinetic energy of infalling bodies come from? (Intermediate) Oct 02 62367
Can astronomers observe anything when the moon is full? (Beginner) Oct 02 64074
Is there a beginning and an end to a galaxy's life? (Intermediate) Oct 02 104060
What was that really big falling star that I saw? (Intermediate) Oct 02 80109
How do you calculate the azimuth and altitude of an object? (Intermediate) Oct 02 143864
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 165290
Why are the Moon and Sun sometimes orange or red? (Beginner) Sep 02 531172
What is the origin of spiral structure in galaxies? (Intermediate) Sep 02 109438
Why does the Sun appear larger on the horizon than overhead? (Intermediate) Sep 02 155069
Can I see details on Venus? (Intermediate) Sep 02 83303
Do the magnitudes and colors of stars ever change? (Intermediate) Sep 02 79997
Why was the Platonic year named after Plato? (Intermediate) Aug 02 74288
Can I calculate the size of the Universe by converting light years to kilometres? (Intermediate) Aug 02 103191
Can the acceleration of the Universe be analogous to apparent acceleration in a airplane? (Intermediate) Aug 02 85068
Why do photos of space taken from space never show any stars? (Intermediate) Aug 02 94306
Is the Earth at the centre of the Universe? (Intermediate) Aug 02 121254
How can a star burn with no oxygen? (Beginner) Jul 02 320425
How are galaxies and solar systems similar? (Advanced) Jul 02 95231
Do supermassive black holes cause galaxy rotation? (Advanced) Jul 02 140112
What causes a particle to decay? (Intermediate) Jul 02 77378
Who (and when) discovered that the earth's axis is on a 23 degree tilt? (Intermediate) Jul 02 133567
Why do pictures of distant galaxies have higher resolution than those of nearby planets? (Intermediate) Jun 02 91506
How is the Cepheid yardstick validated? (Advanced) Jun 02 69860
What would happen if you went back in time and killed your grandmother? (Beginner) Jun 02 67818
What colors are visible through an amateur telescope? (Intermediate) Jun 02 83407
What elements make up the Sun? (Beginner) Jun 02 231692
Is it possible to measure the temperature of the Sun? (Beginner) May 02 194978

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