The Parker Solar Probe will make its closest approach yet to the Sun

Yes, yes, speak orbital dynamics to me!

> The problem is that you don't actually want your spacecraft to fly into the Sun or be going so fast that it passes the Sun and keeps moving. So you've got to have a pretty powerful rocket to get your spacecraft in just the right orbit.

What?! No! I mean, yes, you don't want your spacecraft going right into the sun itself, but that's not the major reason why it's difficult! It's that at launch, the spacecraft is already in orbit around the sun - since it came from the Earth. And left to its own devices, it won't want to "fall" into the sun any more than it already is, any more than the Earth is falling into it. Changing orbital parameters that much is expensive in terms of delta-V!

As I recall, the "cheap" way of getting into a low-enough orbit to get that close to the sun is to counterintuitively first expand your orbit massively, and then do a retrograde burn at the highest point. (But I'm guessing the Parker Solar Probe used gravity assists.)

I wonder if some editor cut a large part of this paragraph.

Yes, innocent mistakes happen in writing and editing all the time. But look at that whole paragraph you're quoting. It does exactly what sloppily-guided AI does: It's using words in an order that sounds relationally intuitive, but taken as a whole it's ping-ponging across completely unrelated concepts. It can't have come from a human, unless, like you said, parts were removed in editing without re-reading the result.