/sci/ - Science & Math

GENERAL
stg edition
previous >>15896959

>4 seconds
you were first, deleted mine.

>>15056748
ok glowtard, maybe you could also tell about your extremist beliefs about society and convince more fellow 4chan users

>>15056728
stop glowing retard

>>15056552
>lunar mission delayed for the sake of a constellation
shit, at least they're getting money.
Do you have the source? I just wanna check if they have a new launch date.

>>15056299
Some times I wish i could hijack SpaceX controls and launch during a static fire. Hopefully the hacker known as 4chan will help me.

someone draw a baseduz gijinka wetting herself please

Asstra Edition

Previous: >>14880241

>>12385750
>>12385755
fuck guys you caught me ):

>>12385693
this, i'd love to see a story like that. but i don't think mars would be loyalist

All you fascists are going to lose. Sad to see /sfg/ has fallen to this shit but I guess nothing lasts forever.

>>12384548
One can only hope. After all, I believe it safe to say that, based upon electoral results, a vast majority of Americans do not hold their view. No granted, this is not the board to speak of politics in. So I will refrain.

I can instantly tell the difference between one of them and a regular user here though. Consider the two responses. One was basically a conspiracy filled rant, while the other (yours) was a response to the state of things.
I appreciate yours.

>>12383425
Oh my word. Is this the geocaching man again?
Are you still active after all this time? I remember the time you had to abandon the project for a while because some of us had managed to intercept you in delaware and spoke in person.

How have you been?

>>12384520
So it would seem. I have heard rumors about those kids on pol and how white nationalists have taken it over. But I had hoped that they had not spread their influence elsewhere. Least of all a personal favorite board I was here for the start of and was centered around actual topical discussions. It would seem that the small minded have tainted a place I had viewed fondly.

>>12384451
Pardon me but fuck you.
That "America first, fuck the rest" has hurt far more than it has helped. If we applied the America first to scientific discoveries we never would have made half the important astronomical discoveries we have made in the past. To say nothing of the VLBI project.

I have nothing further to say to you. You frankly disappoint me.

>>12384394
Actually it's simpler to build on the ground. Guidance systems alone make alignment and compensation a pain in the 4th point of contact. In space, your attitude adjustments have to maintain a single fixed point in space for the duration of 1 orbit (90 minutes) plus the progression of earth along its own orbit. On top of that, RCS control systems use fuel, which is already a scarce resource. Then using reaction wheel systems means you have to design and program the alignment platform and guidance system. On top of that, you need redundancy to ensure that the system will operate in the event of failure. Meanwhile, you can simply program a 4 degree per hour driver on earth using a series of servo motors and the supports. And on top of all that, there are still the problems of replacing failing parts, coolant, hardware hardening (Which already makes the telescope obsolete before launch) and much else. All of these are issues that even with the reduced cost of flights makes having pure spaceborne telescopes rather prohibitive even with the advances. Meanwhile it is an easier solution to simply adjust orbital characteristics of already deployed satellites and allow for their reflective index to be lower.

>>12384319
(Looks like the name system reset itself there... odd)
Starlinks panels reflect sunlight. Which, in the case of a number of the surveys, introduces additional photons into long term collections which are measuring photemetry of stars for the purposes of ascertaining more physical evidence of dark matter and molecular clouds.
While it would be nice for them to be able to filter out the reflected lights from starlink, the fact is that spectrally, the light looks the same as starlight so there are no good patterns which can be applied for filtration purposes.

Again though, I recognize and applaud Spacex. My concerns are minor and do not imply that they should stop. Rather they should be more expedient in dealing with the reflected light problems.

>>12384264
Attitude and panel alignment helps immensely. The light reduction system they've begun implementing after the AAS complained about it helped to really push them into addressing the issue.
https://www.universetoday.com/145949/spacex-describes-exactly-how-theyre-planning-to-make-starlink-satellites-less-visible-from-earth/
To date some constellations have reduced light footprints. But it's not quite acceptable yet. Getting there, but not quite.

That being said, no matter how many people move off world to do astronomy on the moon or mars, there will still be entire generations that turn their eyes skyward and embark on their own journeys of discovery, learning what the heavens above hold.
We have a duty to if nothing else, give them a chance to look and enjoy the wonders that are out there.

>>12384233
Hey I remember sts-110...
I was 16 at the time. Nothing really special about it really. I just excitedly posted onto forums because internet speeds in my hometown were finally fast enough that I could stream NASA tv.

>>12384224
Most ground based astronomy is still large scope based. Even amateurs (Who contribute greatly to the science still believe it or not) routinely use 250 mm scopes. To say nothing of the VLBI project.

>>12384222
Parachutes require a water landing. Which means that freshly oxidized metals will be introduced to a salt water (corrosive) environment.
A winged landing hasn't been practical due to surface area heating and the difficulties of air flow over control surfaces as it relates to aerodynamic stresses. To be fair, Musk Voluntarily chose that route as a means to reduce the total stress on a rockets components.

>>12384219
There are some studies concerning that which I would love to see come to fruition.
https://arxiv.org/pdf/2007.02946.pdf
Unfortunately, as much as I appreciate the work Hubble and eventually Webb (will) be doing, ground work is negatively affected by this. And there are plenty of operations that are done on the ground.

>>12384199
One of the people who used to do these threads back from 2009 until about 2013.
I kind of fell off the face of the earth because I got antarctica duty, then I was out in Arecibo until 2018.

Not good internet in the south to be honest with you....

>>12384189
While I appreciate what spacex is doing to advance spaceflight and international communication, I worry we are losing something essential. That is, a good clear night for research of various cosmic phenomena.
I was at green bank for some work not too long ago and we had to Stow the dish for a while due to starlinks downlinks having variant harmonics that interfered at the hydrogen line.

I was rather disappointed in that. Took us offline during a GRB event we wanted to do a study on.

That being said, I don't disapprove of the intent. Rather I agree with those who applaud their continuing effort to reduce the negative impacts Starlink has on astronomy.