October 2026 brings a lunar occultation of Jupiter, the Draconid and Orionid meteor showers, Vesta at opposition, Saturn near ...

A sweeping survey of rhizosphere soils from four Chinese deserts shows that rare and abundant bacterial taxa around the ...

Judging distance by miles is good enough for most of us on the ground, but for ocean-going vessels and spacecraft nautical ...

To those who have already completed their application: 100 questions to recover points lost before the exam due to confusing ...

This is a collection of 100 four-choice questions for the Second Grade Maritime Officer (Navigation) written exam, intended ...