Please choose the correct ending to complete the given sentence: Health: [header] How to observe mercury [title] Consult astronomical calendars. [step] Mercury is the closest planet to the sun, which means that it is often in the sun's glare and hardly seen. However, there are specific times and seasons where the orbits of the earth and mercury place mercury high above the horizon line.

Ending1: These include : [substeps] Spring, october, and summer. Summer is the best time for your observance, because mercury is especially active on these days. Ending2: What months and at what times of the day mercury is visible is entirely dependent on your location on earth, but most calendars will divide viewing months and times into hemispheres. [substeps] Mercury is best observed in the northern hemisphere during the evening in april and may, and during the morning in october and november. Ending3: If the orbits are well below the horizon line, then mercury is higher in the planet mercury, and may also be around mercury. Saturn (also known as mercury) is the brightest planet in the constellation constellation bullice, and is far to the right of the equator saturn, saturn, and neptune. Ending4: Looking up at astronomical calendars along these routes is certain to be obvious. Saturn is a constellation that encompasses jupiter, the middle planet of the zodiac, aquarius and saturn, and usually only teed down to neptune.

Answer format: ending1/ending2/ending3/ending4