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The launch pad just yet like the artemis rocket. but same day that is certainly a way you could bring down costs. whereas the sls rocket, nasa officials say someday they'll be able to bring down those costs but right now it's approximately $4.1 billion per flight, sara. >> if they end up doing that in the future, it is one step closer to going to mars, which is pretty cool. kristin fisher, thanks so much for joining us. let's bring in meteorologist britley ritz in the cnn weather center. a launch window possible monday, maybe tuesday. what kind of weather conditions are in store monday? >> abs...

Similar. basically they're trying to fuel that main core stage, the big burnt orange core tank with this super cold propellant. it's a mix of very cold liquid hydrogen and liquid oxygen. and once again, we have another hydrogen leak. it is in a different place. it's now in the engine compartment. so this is different from where it was on monday. and nasa says that this is a place that has with stand four previous tests. this particular place has held before. but this time now there's a leak. so they're troubleshooting right now. they stopped the flow of liquid hydrogen. they're trying to warm ...

Try to make some fixes in a short period of time. they do have a two-hour launch window on monday. that's a possibility. they have another launch window on tuesday but it's only like 30 minutes long, that's really not what nasa wants. so if they cannot get this fixed on the launch pad by either monday or tuesday, then it's really not good, because then, sara, they have to take this entire stack, all 322 feet of it, they have to put it back on the crawler and take it all the way back four miles to the vertical assembly building for repairs. and that would mean they couldn't try to launch again ...

Movement of the rocket makes it more likely for there to be issues. and when you think about moving this four miles back to the vertical assembly building, it makes officials nervous. with that said, this is always a very high probability. this is a test flight of the most powerful rocket that has ever been built. there was always a very high probability that it was not going to make it during the first launch window. and so now, if indeed nasa said hey this monday, or tuesday, totally off the table. we can't fix it in time. that means if they have to roll it back to the v.a.b., that it is lik...

Well, the rocket only has a certain launch windows when it can go up and it is not able to launch tomorrow because basically the earth and the men are in the wrong place. monday is possible, it has a two hour launch window then and also tuesday, there is a much shorter at launch window they could try. the issue is, i mean, this is the second time they have tried to get the rocket up, thatis have tried to get the rocket up, that is not uncommon, to get setbacks and delays, but they need to find out doesn't need a big fix? do they need to do major repair work? if so, the rocket might have to go ...