Sep 25, 2025 · What Is a Leap Year? The Short Answer: It takes approximately 365.25 days for Earth to orbit the Sun — a solar year. We usually round the days in a calendar year to 365. To …

Sep 25, 2025 · One year on Earth lasts 365.25 days. That 0.25 extra means every four years we need to add one day to our calendar. We call it a leap day (in a leap year). Earth’s Neighbors …

Sep 25, 2025 · NASA’s award-winning Space Place website engages upper-elementary-aged children in space and Earth science through interactive games, hands-on activities, fun articles …

Sep 25, 2025 · explore What Is a Leap Year? Approximately every four years we add a day to the calendar. Learn more about why it’s important! explore What Is a Tsunami? A tsunami is a …

Sep 25, 2025 · explore What Is a Leap Year? Approximately every four years we add a day to the calendar. Learn more about why it’s important! explore What Powers a Spacecraft? It all …

Sep 25, 2025 · How Long is a Year on Other Planets? You probably know that a year is 365 days here on Earth. But did you know that on Mercury you’d have a birthday every 88 days? Read …

Apr 8, 2024 · This total eclipse happens about every year and a half somewhere on Earth. A partial eclipse, when the Moon doesn’t completely cover the Sun, happens at least twice a …

Sep 25, 2025 · A laser produces a very narrow beam of light that is useful in many technologies and instruments. The letters in the word laser stand for L ight A mplification by S timulated E …

Sep 25, 2025 · Rotation All About Pluto explore What Is a Leap Year? explore How Do Hurricanes Form? explore What Is the Kuiper Belt? explore All About Venus explore

Sep 25, 2025 · Day How Long Is One Day on Other Planets? explore Printable Space Valentines do What Is a Leap Year? explore All About Venus explore All About Mercury explore The …