Q&A 168: Why Aren't There Cameras On James Webb? And More...
In this week's Questions Show I explain why James Webb doesn't have any cameras on board, what the Universe is expanding into, and what is the point of building big telescopes when we're trapped in the Solar System?
Watch the video here or on YouTube:
Comments (4)
?Hi, thanks for all the great content. Do moons have their own Lagrange points, it seems logical that they would, or are they just too low mass to be useful. Could Ganymede have it's own trojans or would it have to be a single moon system because of the disruptions caused by the other moons. Is there a minimum mass/density to get a noticeable Lagrange point? etc.
Sure, there are 5 Lagrange points between the Earth and the Moon. You only get Lagrange points when there's a gravitational interaction between two objects, like the Sun and Jupiter, or the Earth and the Moon. There would be Lagrange points between Jupiter and each of its moons.
❓Can the JWST be hacked? How easy would it be for a bad actor to send it malicious instructions?
Sure, in theory. The telescope is controlled remotely, so anyone could try to gain access and control to it, assuming they had a powerful enough radio telescope to send and receive commands. But I've never heard of a satellite getting hacked.