Magazine Posts

NASA Astronomy Picture of the Day:

Nā ʻUhane Māhoe Huki Pū i ke Ola, is the Hawaiian name given to this image of a pair of spiral galaxies locked in a mutual gravitational embrace. Some 200 million light-years distant toward the high flying constellation Pegasus their spectacular, galactic scale merger is captured in sharp detail in the image from the 8.1 meter Gemini North telescope on Maunakea, Hawai‘i. The galaxy pair, known as NGC 7253 and Arp 278, was chosen as a target, researched, and given a Hawaiian name by high school students in the joint Gemini Observatory and University of Hawaiʻi Project Hōkūlani internship program. The name translates to "The Twin Spirits Pulling Together Creating Life". That's both culturally and astronomically appropriate for galaxy collisions that trigger a cosmic maelstrom of star formation from galactic reservoirs of elemental building blocks of life. These merging galaxies are found within a region of Pegasus identified as the Hawaiian navigational constellation Ka Lupe o Kawelo. APOD's main NASA site is moving: From apod.nasa.gov to science.nasa.gov/apod

Café and restaurant “Marienhöhe”, Norderney, Lower Saxony, Germany.

Dietmar Rabich, CC BY-SA 4.0, via Wikimedia Commons. View source.

Martin Luther King Jr. - (1929 - 1968) American Christian minister, activist and leader in the Civil Rights Movement from 1955 until his assassination in 1968.

NASA Astronomy Picture of the Day:

How do animals react to a total solar eclipse? The featured image shows a stork roosting on her nest in Poland at a partial phase of the recent total solar eclipse. If you are lucky enough to experience a total eclipse somewhere quiet and close to nature, you may be able to notice unusual daytime animal behaviors. During totality, you may hear nighttime sounds like crickets and frogs and see fireflies. In the dark, most birds are quiet. Thinking that it is time to go to bed, ducks and other waterfowl prepare to sleep on one leg, with their heads turned around and their beaks tucked into their back feathers (they don't really sleep with their heads tucked under one wing). When sunlight returns at the end of totality, songbirds greet the new "morning" with their dawn songs. The crickets and frogs go quiet again. Animals and people resume their lives, only briefly disturbed by the chance alignment of our Sun and Moon. APOD's main NASA site is moving : From apod.nasa.gov to science.nasa.gov/apod

Photo by Włodzimierz Bubak Text: Cecilia Chirenti (NASA GSFC, UMCP, CRESST II)

Anna, with Max supporting his mother, decorates a sign for the Almabtrieb. Freiburger Alpe, Bavaria, Germany, September 2024.

Jan Czeczotka, CC BY-SA 4.0, via Wikimedia Commons. View source.

NASA Astronomy Picture of the Day:

Pretend you have never heard of a solar eclipse. The Sun’s behavior has been predictable your whole life. One day, you witness the sky transform as it does in today’s spliced image spanning two hours of the August 12, 2026 solar eclipse. The Sun disappears, leaving behind a bright, empty ring. What would you think had happened? Humans have interpreted eclipses in countless ways throughout history, embedding beliefs about connection, rebirth, or danger into culture. “Eclipse” comes from the Greek word “ékleipsis” meaning “abandonment”. In ancient Greece, the solar eclipse marked the anger of the gods and the Sun abandoning humanity. To the Diné people, this celestial alignment is a time of renewal. Out of respect and to avoid the danger of sunlight, the Diné stay inside until the Sun and Moon separate. The Batammariba people of Benin and Togo believe that the Sun and Moon fight during an eclipse, so the community encourages peace among themselves. Eclipses are an example of the longstanding connection between astronomy and society. Gallery: Solar Eclipse of 2026 August 12

Photo by Javier Castro Text: Keighley Rockcliffe (NASA GSFC, UMBC CSST, CRESST II)

Did You Know?

1. An ordinary cloud can contain about 500 tons of water.
Clouds may look almost weightless, but a typical cumulus cloud about one cubic kilometer in volume can contain roughly 500,000 kilograms—about 1.1 million pounds—of water droplets. Those droplets are extraordinarily small and dispersed through an enormous volume of air, allowing the cloud to remain suspended.

2. Cleopatra life span was closer to the Moon landing than to the building of the Great Pyramid.
The Great Pyramid of Giza was completed around 2560 BCE. Cleopatra VII lived in the first century BCE, while Apollo 11 landed on the Moon in 1969. Cleopatra therefore lived roughly 2,500 years after the Great Pyramid was built but only about 2,000 years before humans walked on the Moon. Ancient Egypt lasted far longer than our mental picture of “ancient times” sometimes suggests.

3. Your body contains enough blood vessels to circle Earth more than twice.
The arteries, veins, and tiny capillaries of the human body form an extraordinary transportation network. Their combined length in an adult is commonly estimated at about 60,000 miles. Earth's circumference is roughly 25,000 miles, so stretched end to end, those vessels could circle the planet more than twice.

4. The world's largest living structure was built by tiny animals.
Australia's Great Barrier Reef extends approximately 1,400 miles (2,300 kilometers) and consists of nearly 3,000 individual reefs. Its builders are coral polyps—small marine animals that produce hard calcium-carbonate skeletons. Generation after generation, their activity contributes to the enormous reef structures we see today.

5. The shortest recorded war lasted less than an hour.
On August 27, 1896, Britain and the Sultanate of Zanzibar fought what is generally regarded as the shortest recorded war. Accounts differ slightly on its exact duration, but the Anglo-Zanzibar War lasted only about 40 minutes. A dispute over succession to the sultanate had escalated into an extraordinarily brief military conflict.

6. Trees may be older than Saturn's rings—but scientists aren't certain.
Trees appeared hundreds of millions of years ago. For some time, evidence from NASA's Cassini mission supported estimates that Saturn's rings might be only a few hundred million years old. More recent research, however, has challenged an important method used to reach that conclusion and leaves open the possibility that the rings are billions of years old. So the appealing claim that “trees are older than Saturn's rings” remains possible, but it should not currently be treated as established fact.

7. The dot over a lowercase “i” or “j” has a name.
It's called a tittle. The word refers to a small point or mark used in writing or printing and has been used in English for centuries. It is one of those familiar things most of us see every day without ever wondering whether it has a name.

8. Earth's tectonic plates move about as fast as your fingernails grow.
The continents appear stationary during a human lifetime, but the enormous tectonic plates carrying them are continually moving. Typical rates are only a few centimeters each year—roughly comparable to fingernail growth. Over millions of years, however, those tiny movements can open oceans, build mountains, and rearrange continents.

Sometimes the familiar world becomes much more interesting when we look a little closer. Look Closer. Explore. Discover. Learn.

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Red Sea bannerfish (Heniochus intermedius), Red Sea, Egypt. The Red Sea bannerfish attains as maximum total length of 18 centimetres (7.1 in) and is native to the western Indian Ocean where it is found in the Red Sea and the Gulf of Aden. It's associated with coral reefs where it is most frequently recorded as a solitary fish or in pairs, although large schools have been recorded. The juveniles form large schools, particularly in areas of deep reef where there is a low density of corals. They feed on both zooplankton and benthic invertebrates but the extent to which they feed on live coral has still to be determined. It is an oviparous species which forms monogamous pairs for spawning. It's collected for the aquarium trade but its collection is of a limited scale and is not believed to be a threat to the species population.

Diego Delso, CC BY-SA 4.0, via Wikimedia Commons. View source.