571 USA September 2020

USA SEPTEMBER

2020

International Day of Light: The Parallel Earth and the Seasons 2020

Parallel Earth to Watch the Season ACTIVITIES TO CARRY OUT AND SEND Perform the Parallel Earth Experience after reading the description of the proposal and submit Table 1 completed with the acquired data and one or more attached images of the experience. If you wish, also send a photograph of a solar clock made by your students.

Table 1. Parallel Earth Data Mirjana Božić

Teacher's name email

bozic@ipb.ac.rs Outdoor Science Education Team Members: Erin Artin, Jelena Popović, Mirjana Božić

School City, Country Latitude, Longitude Day and hour

Boston

Massachusetts, USA

42,41840N

71.10620W

24th September 2020, 10:36 - 10:40 h am

Note: it is very important that the photographs correspond to the place, day and time mentioned in Table 1 Optional: to complete the experience, those professors and students who wish may send photographs of a solar clock made by them.

Project launch: March 20, 2020 (equinox) The activity will be open until: September 23, 2020 (equinox) The results are framed within the initiative of the International Day of Light

The photos are recorded in the interval of four minutes (10:36 - 10:40 h am) from several directions in order to register the whole DAY NIGHT LINE (terminator).

Since September 24 is near the autumn equinox the terminator is along the meridian. One sees that in a very good approximation Sun set line is 60 degrees to the East from Boston and Sun rise line is 120 degrees to the West. It is consistent with the fact that the time of observation was about 4 hours after Sun rise and 8 hours before Sun set in Boston on September 24.

Boston, September 24, 2020, 10:36.16 am

Boston, September 24, 2020, 10.36.41 am

Boston, September 24, 2020, 10:38.51 am

Boston, September 24, 2020, 10:39.38 am

Boston, September 24, 2020, 10:39.43 am

Boston, September 24, 2020, 10:38.28 am

Boston, September 24, 2020, 10:38.13 am (Down town Boston is in the Background)