124
Interstellar medium – The means of the interstellar medium account for less than 1% of the mass in elliptical galaxies, about 5% in spiral galaxies, and about 10% in irregular galaxies.
Interstellar medium – The means of the interstellar medium account for less than 1% of the mass in elliptical galaxies, about 5% in spiral galaxies, and about 10% in irregular galaxies.
Lewis Carroll writes about military space programmes, policy, technology and the industry that supports the sector. He spent nearly two decades covering the military, the Pentagon, Congress and the defence industry as a journalist for Space Chatter magazine.