Another week, another batch of questions. If ice disappears in your freezer, how can it last in space? How can the Universe be expanding faster than the speed of light? And what is the risk from a coronal mass ejection in an airplane? All this and even more questions. If you’ve got a question for the Astronomy Cast team, please email it in to firstname.lastname@example.org and we’ll try to tackle it for a future show. Please include your location and a way to pronounce your name.
If ice disappears in your freezer, how can it last in space?
- Sublimation of ice — USGS
- Ice in craters on the Moon? Latest data says no — Universe Today
- Water and ice in the universe
Are objects moving away from us faster than the speed of light?
- How Can Galaxies Recede Faster Than the Speed of Light? — Universe Today
- The Expanding Universe — SDSS
- How fast is the Universe expanding? — NASA
Are people in airplanes subject to more radiation from a Coronal Mass Ejection blast?
- Cosmic Radiation and Airline Crew Radiation Exposure — Astroprof
- Coronal Mass Ejections (CME) — Windows to the Universe
- Solar Maxiumum — GSFC
- Primer on Space Weather — NOAA
Will the Sidereal Day and the Solar Day ever be the same?
- Sidereal Day –– World of Astronomy
- Solar Day — World of Astronomy
- Timekeeping: solar day vs. sidereal day — UTK
- Is Earth’s rotation slowing down? — Physics and Astronomy Online
Does light have mass?
- Does light have mass? — Discussion on BAUT Forum
- Does light have mass? — Cornell University
- How gravity affects photons — GSFC
- Characteristics of a photon — Play Hookey.com
- E = hv = hc/lambda
- And Einstein’s famous E = mc^2
Does the Coriolis Effect affect how water drains?
- Coriolis Force — UIUC
- Bad Coriolis — PSU
- Read Phil Plait’s first book “Bad Astronomy” — he devotes an entire chapter to the Coriolis Effect
If a large asteroid hit the moon in just the right way, could the moon hit the Earth?
- Asteroid Ceres — Planetary Society
- Program to calculate the effect on Earth from various sizes of impacts — U of AZ
- Discussion on this question on Physics Forums
Does dark matter decay over time?