That’s true for why it takes more careful aim to get to the sun than deep space, but not why it literally takes more energy, more work, more fuel to get into the sun than it does to get away from it. That part is just like the fact that reaching space is easy, but remaining in orbit is hard.
Earth is already moving at orbital velocity around the sun. Escape velocity for the solar system from here is about 40 km/s, and we’re already orbiting at about 30 km/s. So getting away needs a delta v of about 10 km/s, but hitting the sun needs a delta v of 30 km/s.
That’s true for why it takes more careful aim to get to the sun than deep space, but not why it literally takes more energy, more work, more fuel to get into the sun than it does to get away from it. That part is just like the fact that reaching space is easy, but remaining in orbit is hard.
Earth is already moving at orbital velocity around the sun. Escape velocity for the solar system from here is about 40 km/s, and we’re already orbiting at about 30 km/s. So getting away needs a delta v of about 10 km/s, but hitting the sun needs a delta v of 30 km/s.