# IV explained — The Black Star Passes

> Chapter companion for The Black Star Passes by John W. Campbell.

## What happens

Arcot and Morey discuss the economic and environmental impacts of Arcot's molecular motion machine, including its effects on urban air traffic, temperature, and resource scarcity. They then pursue a pirate aircraft, using a high-speed orbital chase to catch it with an electromagnet.

## Themes in this chapter

### Scientific Progress and Innovation

Arcot's molecular motion machine is presented as a transformative technology with applications in power generation, weather control, and space travel.

### Exploration and Adventure

The high-speed orbital chase and discussion of interplanetary colonization highlight the theme of venturing into the unknown.

### Survival and Resource Scarcity

Arcot warns of impending metal shortages and suggests mining other planets as a solution, emphasizing the need for new resources.

## Character check-ins

### Robert Arcot

Discusses the economic and environmental implications of his invention, including weather control and interplanetary colonization, and pilots the ship during the pursuit.

### President Arthur Morey

Observes the traffic issues in New York, operates the radar and invisibility disrupter, and assists in the chase.

### John Fuller

Asks about the global cooling effect of the machines and is assigned to the machine gun during the chase.

## Key lines

> If it weren't for gyroscopic stabilizers, they could never live in that huge airpocket. I have to drive in through there. I'm always afraid that somebody with an old worn-out bus will have stabilizer failure and will really smash things.

Morey explains that without gyroscopic stabilizers, the turbulent air currents in the city would be unmanageable, and he fears accidents from failing equipment.

_Highlights the dangers of urban air traffic and reliance on technology._

> We have a practically inexhaustible source of energy now, but we have no sources of minerals that will last indefinitely. Copper is becoming more and more rare. Had it not been for the discoveries of the great copper fields of the Sahara and in Alaska, we wouldn't have any now. Platinum is exhausted, and even iron is becoming more and more valuable.

Arcot points out that while energy is abundant, mineral resources are dwindling, with copper, platinum, and iron becoming scarce.

_Foreshadows the need for interplanetary resource extraction._

> I'll overtake him going west. If I went the other way I'd meet him going at over 10 miles a second in relation to his machine. He had the right idea. He told me to fall out to him at a greater than orbital speed.

Arcot plans to catch the pirate by matching his orbital speed and then falling toward him, using the Earth's gravity to slow down.

_Demonstrates the technical strategy for the space chase._

## Links

- HTML: https://www.betterreads.online/discover/the_black_star_passes_se/chapters/iv
- Book: https://www.betterreads.online/discover/the_black_star_passes_se
- All chapters: https://www.betterreads.online/discover/the_black_star_passes_se/chapters