Moderators: richierich, ua900, PanAm_DC10, hOMSaR
texl1649 wrote:Nomadd wrote:zuckie13 wrote:Exactly - it's a point you can stay near by orbiting that allows the Earth to act as part of the observatories sun shielding all the time. It's the closest point to earth with that property.
You absolutely don't want the Earth to help shield the Webb. Part of the reason for the large orbit around the L2 point is to keep the scope from passing through the Earth's shadow. The thermal transitions would screw everything up.
I believe the JWST will stay in the earth’s shadow the whole time. Part of the reason for L2’s selection was just that, as it helps keep it so cool?
bikerthai wrote:So what is the answer?
Is the Earth partially block the sun or does not block the sun at all? Thus the sun shield and solar panel?
bt
zanl188 wrote:Regarding inflight serviceability of JWST. Provisions have been made to refuel the spacecraft...
tommy1808 wrote:texl1649 wrote:Nomadd wrote:You absolutely don't want the Earth to help shield the Webb. Part of the reason for the large orbit around the L2 point is to keep the scope from passing through the Earth's shadow. The thermal transitions would screw everything up.
I believe the JWST will stay in the earth’s shadow the whole time. Part of the reason for L2’s selection was just that, as it helps keep it so cool?
So ... the solar panel is just dead weight?
Best regards
Thomas
zululima wrote:The deployment trigger was event-based, and not time-scheduled. Webb was put into a stable trajectory/configuration earlier than estimates, which were conservative. Another thumbs up to Ariane 5 I guess.
texl1649 wrote:Informative site with distance and other data listed live;
https://webb.nasa.gov/content/webbLaunc ... sWebb.html
FGITD wrote:Read on a tweet from spaceflight now that the Webb mission systems engineer team is confirming that the Ariane 5 did its job exactly as perfectly as possible, and the estimated fuel lifespan for Webb is now estimated to be about 20 years. This was originally one of the most conservative estimates, now a reality.
Gotta say, in the grand scheme of the project, the launch might only seem like a blip, but Ariane really did everyone proud.
ZaphodHarkonnen wrote:O_O
A dozen years late and astoundingly over budget. But they did it! <3
ZaphodHarkonnen wrote:
Everyone involved in the delivery and operations for JWST have been smashing it out of the park right now. Telescope is fully unfolded, delivery was so spot on it would make Tory Bruno of ULA proud for Arianespace. Other than being disgustingly over budget and late, it is going well so far.