3
votes
0answers
105 views

Mission to Mars: halachic challenges

There is talk in the scientific community of a manned Mars mission: sending an elderly couple to slingshot past Mars and return to Earth as a trial mission, toward eventual other missions that will ...
1
vote
2answers
182 views

Electronic sliding doors on shabbat

What can a person who is staying at a hotel which has only electronic sliding doors that open when one walks near them do to avoid any issue on shabbat? Wait for someone else to enter and ...
3
votes
0answers
45 views

Best practices for long-distance Nihum Aveilim and Kavod HaMeith

What are some best practices for people who learn from afar of the passing of an individual (not immediate family) and who want show their respects to the deceased and the surviving family? If they ...
23
votes
4answers
1k views

bicycle on Shabbat?

Is riding a bicycle on Shabbat permitted within an eiruv, being ridden only on pavement (so no unintended plowing), for transportation and not exercise, and with the understanding that repairs aren't ...