Artemis rocket to the moon

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Avatar of Elroch
RonaldJosephCote wrote:

   Elroch, I was dead serious about the marksman comment. They compensated for those trajectory changes. They hit a target 6.8 million miles away......which is exactly what they were aiming for. They have the science and the know-how, and the skill to do that.  I can't even throw something in the trash without missing....   After reading your comment again, I realize you're not trying to dismiss my comment....your just taking the "pure" science stance. Its dam impressive no matter how you look at it.                              "This day in History"......... A win for the scientist and astronomers.                      

I can drive 300 miles, find a specified target 1mm wide and put the point of a pen on it. Am I the world's best marksman? No.

DART is not a marksman's shot, perfectly accurate from the outset, it is an adjusted course that is always in close to the ideal direction (calculated using Newtonian mechanics for the time until the craft is near the target).

This involves a series of course corrections (at 2 months from impact by the primary space craft and at 90 minutes from impact by the impacter, each made based on a new calculation of how the craft and target will move in the future. No greater accuracy is needed than in the analogy of driving to a precise location and finding a tiny target.

It's an interesting fact that while the impact had no significant effect on the risk of impact with the Earth, if the asteroid was going to be involved in a close pass with the Earth, a well-timed impact as small as this would be enough to make it safe! So the mission is not pie in the sky (excuse me) but a practical test of a valuable capability.

Avatar of Elroch

No, not a miracle. It's rocket science. Here is a non-miracle (the world's most powerful rocket by a factor of two) watched directly by hundreds of thousands from the ground.

Avatar of Elroch

As I said, don't be so "open-minded" your brains fall out. If you want to appear like a gurgling fool, it would be better to find like-minded people and not spam a forum about real space science.

Avatar of Elroch

If you think referring to fiction is relevant to the discussion of real rockets observed directly by hundreds of thousands, your brain is broken.

Avatar of snoozyman
Bye Hiram
Avatar of Mattew

Me waiting for Artemis to be launched :

Avatar of Woollensock2
Will the launch be before Christmas ! 🤷‍♂️……..or maybe wait for April 1st next year ! …….just saying ! 🤷‍♂️
Avatar of RonaldJosephCote

   What was that bizarre light in the sky Saturday night? surprise                                      

Sadly, the answer may not be as exciting.

SpaceX successfully launched its Falcon-9 rocket from Cape Canaveral in Florida just after 7:30 p.m. Saturday evening.

The rocket’s upper stage deployed 52 Starlink satellites into orbit.

Tonight’s launch may be the last one for the time being as Tropical Storm Ian is expected to impact Florida’s west coast early next week.

Avatar of Woollensock2
Aren’t they enough satellites 📡 already in orbit. The environment on the ground as already been junked , now they want to do the same in space ! 🙀
Avatar of Elroch

There are a remarkable number of them up there. Many thousands. And a huge amount of junk too - debris from collisions, tools that have been dropped, bits that have fallen off...!

Avatar of snoozyman
Hurricane Ian is the reason for the 3rd cancellation.
Avatar of Wits-end

Even NASA doesn’t control the weather!

Avatar of duntcare
snoozyman wrote:

Engineers are still troubleshooting engines, it's been over an hour. Sigh...😞 

thats expected

they switched fuel types

Avatar of duntcare

they switched from using solid fuel again which requires fueling not long before the takeoff, im not an expert on this as my knowledge comes only from military use of these but theres a lot of elements w corrosive liquid fuels and such

the downside of solid fuel is i guess is im guessing in the space field efficiency or other such range etc issues with progression of tech

the other issue i think is launch times, solid taking more launch prep (i suppose this isnt an issue in the space field but only in missile launch capabilities) 

Avatar of Elroch

I am pretty sure you get a higher specific velocity with liquid hydrogen/oxygen. And it is definitely more awkward to deal with.

Avatar of RonaldJosephCote

   The rocket itself was out on the launch pad. The day before the storm they rolled it back into the hanger. Good thing.....the storm passed directly over Cape Canaveral. surprise

Avatar of duntcare
Elroch wrote:

I am pretty sure you get a higher specific velocity with liquid hydrogen/oxygen. And it is definitely more awkward to deal with.

ic

from what i know the first few types of liquids they tried were either, dangerous, corrosive, toxic or a combination or just bad so i guess they settled on hydrogen oxygen and i can see why that gets delayed, its super leaky and likes going out of places if its not perfectly sealed 

Avatar of Elroch

Artemis launch has been delayed until November!

Avatar of idilis

hiram will declare a holiday now

Avatar of Woollensock2
Looks like April 1st to me for the next launch 🚀 ✌️😎