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Explore major historical events from today or any day on Kudos 365.

Hannah Arendt ( 1906 - 1975 ) German-American historian and philosopher. She was one of the most influential political theorists of the 20th century. Her works cover a broad range of topics, but she is best known for those dealing with the nature of power and evil, as well as politics, direct democracy, authority, and totalitarianism. She is commemorated by institutions and journals devoted to her thinking, the Hannah Arendt Prize for political thinking, and on stamps, street names, and schools, amongst other things. More

NASA Astronomy Picture of the Day:

What's different about this Moon? It's the terminators. In the featured image, you can't directly see any terminator -- the line that divides the light of day from the dark of night. That's because the featured image is a digital composite of many near-terminator lunar strips over a full Moon. Terminator regions show the longest and most prominent shadows -- shadows which, by their contrast and length, allow a flat photograph to appear three-dimensional. The overlay images were taken over two weeks in early April. Many of the Moon's craters stand out because of the shadows they all cast to the right. The image shows in graphic detail that the darker regions known as maria are not just darker than the rest of the Moon -- they are also flatter. Dial-A-Moon: Find the Moon phase on your birthday this year

Photo by Rich Addis

The Hawaiian islands as seen from the International Space Station. Today is Earth Day.

NASA, Public domain, via Wikimedia Commons. View source.

Earth Day is an annual event celebrated on April 22 since 1970. It is a time to demonstrate support for environmental protection and an important reminder that we all have a role to play in protecting the planet. Earth Day 2025 theme  is "Our Power, Our Planet". Here are simple things we can all do to invest in our planet:
Recycle - Pick up litter - Reuse single use plastic items - Plant a tree - Build a birdhouse / bird feeder. Learn more about this year's theme and get more tips

Credit for the Earth Day idea goes to Gaylord Nelson, an American politician from Wisconsin and leading figure in the fight against environmental degradation and social injustice. Rachel Carson, a marine biologist and best-selling author provided the spark for this movement with the 1962 publication of her book, "Silent Spring" which showed the devastating effects of modern pesticides on the natural world.

NASA Astronomy Picture of the Day:

Is this one galaxy or two? Although it looks like one, the answer is two. One path to this happening is when a small galaxy collides with a larger galaxy and ends up in the center. But in the featured image, something more rare is going on. Here, the central light-colored elliptical galaxy is much closer than the blue and red-colored spiral galaxy that surrounds it. This can happen when near and far galaxies are exactly aligned, causing the gravity of the near galaxy to pull the light from the far galaxy around it in an effect called gravitational lensing. The featured galaxy double was taken by the Webb Space Telescope and shows a complete Einstein ring, with great detail visible for both galaxies. Galaxy lenses like this can reveal new information about the mass distribution of the foreground lens and the light distribution of the background source.

Flowers of a Lily of the valley Focus stack of 18 photos.

Agnes Monkelbaan, CC BY-SA 4.0, via Wikimedia Commons. View source.

Alexander Pope - (1688 – 1744) was an English poet, translator, essayist and satirist of the Enlightenment era and an exponent of Augustan literature. He is considered one of the most prominent English poets of the early 18th century. Pope is best known for his satirical and discursive poetry including The Rape of the Lock, The Dunciad, and An Essay on Criticism, and for his translations of Homer. More

NASA Astronomy Picture of the Day:

The Great Nebula in Orion is a colorful place. Visible to the unaided eye, it appears as a small fuzzy patch in the constellation of Orion. Long exposure, multi-wavelength images like this, however, show the Orion Nebula to be a busy neighborhood of young stars, hot gas, and dark dust. This digital composite features not only three colors of visible light but four colors of infrared light taken by NASA's orbiting Spitzer Space Telescope as well. The power behind much of the Orion Nebula (M42) is the Trapezium - four of the brightest stars in the nebula. Many of the filamentary structures visible are actually shock waves - fronts where fast moving material encounters slow moving gas. The Orion Nebula spans about 40 light years and is located about 1500 light years away in the same spiral arm of our Galaxy as the Sun.

Photo by Infrared: NASA, Spitzer Space Telescope; Visible: Oliver Czernetz, Siding Spring Obs.