The summer solstice marks the official start of astronomical summer...

Today is the summer solstice in the Northern Hemisphere. It’s summertime! 😎 Earth orbits at an angle. Solstices happen twice a year, at the points in Earth’s orbit where this tilt is most pronounced. Half the year the Northern Hemisphere is tilted toward the Sun — making it summer. The other half of the year, the Northern Hemisphere is tilted away from the Sun making it winter. The summer solstice is the longest day of the year & the official start of summer. | NASA Space Alerts

107K views · 1K reactions | It's the summer solstice! This precise moment in Earth's orbit has been an astronomical signpost observed by humans for millennia – so however you're spending your day, take a moment to celebrate this shared celestial connection. ☀️ | NASA Jet Propulsion Laboratory | Facebook