Earth
- Seasonal Sunset Watches (Sep 2021)
- Seasonal Sunset Watches! (Jun 2019)
- March 20 Spring Equinox Sunset Watch — 2018 (Mar 2018)
- March 20 Spring Equinox Sunset Watch — 2017 (Mar 2017)
- Spring Equinox Sunset Watch – 2015 (Mar 2015)
- Fall Equinox Sunset Watch with Preschool Activities! – 2014 (Sep 2014)
- Summer Solstice Sunset Watch – 2014 (Jun 2014)
- Spring Equinox Sunset Watch – 2014 (Mar 2014)
- Comet ISON from Seattle (Sep 2013)
- Fall Equinox Sunset Watch – 2013 – Toddler Special and ISON Q&A (Sep 2013)
- What If We Had No Moon? (Oblivion Spoilers) (Apr 2013)
- Spring Equinox Sunset Watch — 2013 (Mar 2013)
- Too Many Meteors? Nah. (Feb 2013)
- Thunderstorms and Gamma Ray Flashes?! (Jan 2011)
- Iceland Volcano – Eyjafjöll (April 14, 2010) (Apr 2010)
- Earthquakes and the Length of a Day (Apr 2010)
- Earth-Centered Events (Mar 2010)
- Animal Astronomy (Jun 2009)
- Earth Revealed: Astronomy Day 2009 at Pacific Science Center (Apr 2009)
- GPS Satellites (Apr 2009)
- American Moon Illusion (Mar 2009)
- Earth Hour (Mar 2009)
- Calendrical Conundrums (Dec 2008)
- The Star of Bethlehem (Dec 2008)