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 177482
Would the biggest airplanes cause tsunamis if they crashed? (Intermediate) Feb 05 65635
Do we really observe the edges of galaxies at different epochs? (Advanced) Oct 04 66816
Do the Sun's or Earth's magnetic field reverse? (Intermediate) Jan 04 80210
When are there 5 Sundays in February? (Intermediate) Jan 04 87734
Are names given to black holes? (Advanced) Dec 03 105984
How can we find galaxies behind the Milky Way? (Intermediate) Sep 03 97443
Can I communicate faster than light? (Advanced) Aug 03 88450
Is there such a thing as hyperspace? (Intermediate) May 03 64182
How do we know that sunspots are associated with the Sun's magnetic field? (Intermediate) Apr 03 72397
Does inflation allow for an infinite number of universes? (Advanced) Apr 03 59300
What is the origin of the stellar classification system "OBAFGKM"? (Intermediate) Mar 03 87648
How are planets affected by the Hot Ionised Medium? (Advanced) Mar 03 47971
Why don't people walk upside-down on the bottom of the Earth? (Beginner) Mar 03 231585
How long has humanity known that we live in a galaxy similar to others in the Universe? (Intermediate) Feb 03 59432
How are galaxy distances inferred from their recessional velocities? (Intermediate) Jan 03 94743
Did I really hear a meteor? (Intermediate) Jan 03 70632
Do we have to worry about relativity when studying galactic objects? (Intermediate) Jan 03 55275
Does the temperature of matter increase as it is accelerated to relativistic speeds? (Advanced) Dec 02 66267
How do sunrise and sunset times change with altitude? (Intermediate) Nov 02 125602
How do we know what parameters to use when simulating the collision of the Milky Way and Andromeda? (Advanced) Nov 02 71381
Can we look back far enough in time to see the Big Bang? (Beginner) Nov 02 124296
How can the Universe expand faster than the speed of light during inflation? (Advanced) Nov 02 157070
Why is pressure broadening greater in low mass stars than in high mass stars? (Advanced) Nov 02 55175
Why is sea water salty, and not lake water? (Beginner) Nov 02 106931
How many moles of stars are in the known universe? (Beginner) Oct 02 78075
Do binary or triple star systems form together? (Intermediate) Oct 02 60960
Why doesn't dark matter fall into a black hole? (Advanced) Oct 02 87068
Where does the kinetic energy of infalling bodies come from? (Intermediate) Oct 02 57966
Can astronomers observe anything when the moon is full? (Beginner) Oct 02 58888
Is there a beginning and an end to a galaxy's life? (Intermediate) Oct 02 97463
What was that really big falling star that I saw? (Intermediate) Oct 02 75311
How do you calculate the azimuth and altitude of an object? (Intermediate) Oct 02 136924
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 154780
Why are the Moon and Sun sometimes orange or red? (Beginner) Sep 02 519017
What is the origin of spiral structure in galaxies? (Intermediate) Sep 02 104348
Why does the Sun appear larger on the horizon than overhead? (Intermediate) Sep 02 145719
Can I see details on Venus? (Intermediate) Sep 02 76580
Do the magnitudes and colors of stars ever change? (Intermediate) Sep 02 74086
Why was the Platonic year named after Plato? (Intermediate) Aug 02 67815
Can I calculate the size of the Universe by converting light years to kilometres? (Intermediate) Aug 02 96215
Can the acceleration of the Universe be analogous to apparent acceleration in a airplane? (Intermediate) Aug 02 79916
Why do photos of space taken from space never show any stars? (Intermediate) Aug 02 89830
Is the Earth at the centre of the Universe? (Intermediate) Aug 02 110395
How can a star burn with no oxygen? (Beginner) Jul 02 309086
How are galaxies and solar systems similar? (Advanced) Jul 02 86566
Do supermassive black holes cause galaxy rotation? (Advanced) Jul 02 131072
What causes a particle to decay? (Intermediate) Jul 02 71525
Who (and when) discovered that the earth's axis is on a 23 degree tilt? (Intermediate) Jul 02 123827
Why do pictures of distant galaxies have higher resolution than those of nearby planets? (Intermediate) Jun 02 85796
How is the Cepheid yardstick validated? (Advanced) Jun 02 64430
What would happen if you went back in time and killed your grandmother? (Beginner) Jun 02 63214
What colors are visible through an amateur telescope? (Intermediate) Jun 02 77857
What elements make up the Sun? (Beginner) Jun 02 223800
Is it possible to measure the temperature of the Sun? (Beginner) May 02 185696

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