The Moon You Can't See — But the Ocean Sure Can

Professor Pip stood at the top of a soft, grassy hill, his lab coat flapping gently in the night breeze. Above him, the sky was the deepest blue-black, freckled with more stars than the children had ever seen.

"Now this," he whispered, pulling out his small brass telescope, "is what we call a super new Moon sky. And it's only going to last a few nights."

Mia squinted up. "Where's the Moon?"

"That's the trick!" Pip's whiskers twitched into a grin. "You can't see it. It's there — closer than it'll be all year, just 357,000-some kilometers away — but it's standing right between us and the Sun. The sunny side is pointed away from us. So to our eyes, the Moon vanishes."

"That's so weird," said Leo.

"And here's what's wonderful." Pip pulled a long piece of rope from his coat pocket. He handed one end to Mia, the other to Leo. "Mia, you're the Moon. Leo, you're the Sun. I'm Earth, with all my oceans. Now both of you — gently — pull on the rope."

Mia tugged. Leo tugged. Pip's coat swayed in the middle.

"See how my coat lifts on both sides? When the Sun and the Moon line up in a row, they pull together. Their pulls add up. And that pull bulges the oceans — making tides higher when they're high, and lower when they're low. We call this a spring tide."

"But the water doesn't fly to the Moon," Mia checked.

"Oh no, just a little tug," Pip laughed. "A few inches. But all across the ocean, a few inches of extra water adds up to a LOT. When the Moon is at its closest point — its perigee — that pull gets just a tiny bit stronger. And when that happens during a new Moon, scientists call it a super new Moon."

"Like a celestial tug-of-war!" said Leo.

"Exactly right!" Pip beamed. "And here's the bonus gift. Because the Moon is hidden and the sky is the darkest it'll be all month — tonight is the perfect stargazing night. The Milky Way. Tiny faint stars no one usually sees. Maybe a shooting star or two."

He held the telescope up. The children took turns peering through. A pale silver streak of meteor zipped overhead.

"Curiouser and curiouser," Pip said softly, looking up. "Even when something hides itself away — it can still be pulling at the whole world."

He handed each of them a tiny pebble. "Tonight, drop this in a glass of water. Watch how something so small can move so much. Then go outside, look up, and remember — the biggest pull on the ocean right now is invisible."