Latest Z Technologies

What are the latest space vehicle propulsion technologies being researched?

Go into as much detail as you want, even down to chemistry, physics, and engineering.

Public Comments

1. the latest i have herd of is matter and anti-matter engins. they would work by combining a small ammount of matter with a small ammount of anti-matter to creat a very large consistant ammount of energy
2. The following technologies require further research: Magnetic sails Mini-magnetospheric plasma propulsion Nuclear pulse propulsion (Orion drive) Gas core reactor rocket Antimatter catalyzed nuclear pulse propulsion Nuclear salt-water rocket Beam-powered propulsion Fission sail Fission-fragment rocket Nuclear photonic rocket The following technologies are significantly beyond current engineering: Fusion rocket Bussard ramjet Antimatter rocket Redshift rocket