contrail

A wispy line forms along the particle’s path, like a miniature contrail.

The temperature is not too hot and the day gives me a very blue sky through which several planes fly, leaving that thin contrail by which they can be tracked.

In the past 20 years, military pilots have made more than 120 sightings of objects with no apparent signs of conventional propulsion—no exhaust or contrails, and certainly no wings or fins.

Abed Nofal, 35, was on the phone in his house in Gaza’s Jabaliya neighborhood, enjoying the relative comfort of living next to farmland that he considered an unlikely target, when he saw a rocket contrail streaking his way.

That’s important because soot helps form contrails, which trap heat in the atmosphere and contribute to climate change.

The sense of the eternal laws comes only to those who can contrail them through long experience.