Orion's third flight will haul two pieces of a space station to lunar orbit | The Planetary Society
So first flight is Block 1 and sends uncrewed Orion around the Moon.
Second flight is Block 1 again and sends crewed Orion around the Moon.
Third flight is Block 1 for Europa Clipper.
Fourth flight is Block 1B and sends crewed Orion to orbit the Moon and deliver LOP-G parts.
Will be really interesting to see if we ever get to Block 1B.
So first flight is Block 1 and sends uncrewed Orion around the Moon.
Second flight is Block 1 again and sends crewed Orion around the Moon.
Third flight is Block 1 for Europa Clipper.
Fourth flight is Block 1B and sends crewed Orion to orbit the Moon and deliver LOP-G parts.
Will be really interesting to see if we ever get to Block 1B.
