What instrument developed in the 1600’s led to the discovery of additional objects other than the five planets, Mercury, Venus, Mars, Jupiter and Saturn, which visible to the naked eye?

Telescope also known as "spyglass"

Explanation:

In 1609, using this early version of the telescope, Galileo became the first person to record observations of the sky made with the help of a telescope. He soon made his first astronomical discovery.

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.