Earth’s tilt is what causes the seasons; in the summer, when our planet’s pole is tipped toward the sun, the days are longer, and the true sun’s daily path across the sky is higher. The opposite is ...

Earth’s axial tilt reaches its northern max today, delivering the year’s deepest sunrise-to-sunset stretch—more than 15 hours ...

You may have heard the phrase "the dog days of summer," but do you know the science behind the saying? Hint: it's got nothing ...

Summer officially began Friday in the Northern Hemisphere with the longest daylight of the year at around 15 hours.

The Northern Hemisphere has reached its peak sunshine, marking the summer solstice – the longest day of the year and the official start of astronomical summer. Conversely, for those in the Southern ...

Summer Solstice 2025 occurs on June 20 at 10:42 PM EDT, marking the official start of summer in the Northern Hemisphere. It’s the longest day of the year, when the Sun reaches its highest point ...

Adventure seekers and travelers might argue that summer informally begins with the Memorial Day weekend. Then there's solar ...

Discover the science behind the Summer Solstice 2025, the longest day of the year, explained simply for students. Learn why June 20, 2025, brings more daylight, the Earth’s tilt, and fun facts ...

Earth maintains a tilt of approximately 23.5° on its axis. As the planet orbits the Sun, this tilt causes different hemispheres to receive varying amounts of direct sunlight throughout the year.

Leap years adjust for this, helping to keep our calendar aligned with the planet's position. Scientifically, the summer solstice highlights Earth's 23.5-degree axial tilt, the reason for our seasons.

The Earth's axis is tilted about 23.5 degrees relative to its orbital plane. This tilt, known as axial tilt or obliquity, is responsible for the changing seasons as the Earth orbits the Sun.