Final answer:
The LightSail-1 project involves launching spacecrafts with solar sails that use the Sun's photons for propulsion. The phrase 'with a solar sail on the way' refers to this method of space travel.
Step-by-step explanation:
The statement 'We can get them launched with a solar sail on the way' refers to a spacecraft propulsion method that utilizes the momentum of photons from the Sun to propel a craft. This method is exemplified by the LightSail-1 project, which is a citizen-funded initiative by the Planetary Society. It involves the deployment of two crafts each carrying a large, thin mirror-like sail. These sails are designed to catch the Sun's photons, using the force imparted by their reflection to propel the spacecraft without the need for conventional fuel.
The latter part of the student's question 'It is in good-faith that the ____________ is also on the way' could be discussing the anticipated outcomes or additional applications of the technology. However, without further context, it's challenging to define precisely what is intended to fill the blank. It may imply further advancements, subsequent missions, or the hoped-for success of the project.