The sextant, a practical tool for celestial (sky) navigation, was in common use. The chronometer (an accurate clock) had been invented but had not yet become widely used. ... An angle-measuring instrument called a sextant, to measure the angle of the stars above the horizon.
Answer:
Always true
Explanation:
If hes older than you he will always be older than you.
You might recognize that a tsunami is approaching because the ocean tide begins to recede to an extremely low level.
The scientist will publish it and do further observations in order for it to be 100% accurate
