Magazine Posts

NASA Astronomy Picture of the Day:

Shrouded in a thick atmosphere, the surface of Saturn's largest moon, Titan, is really hard to see. Small particles suspended in Titan's upper atmosphere cause an almost impenetrable haze, strongly scattering light at visible wavelengths and hiding surface features from prying eyes. Still, Titan's surface is better imaged at infrared wavelengths, where scattering is weaker and atmospheric absorption is reduced. Arrayed around this visible light image (center) of Titan are some of the clearest global infrared views of the tantalizing moon so far. In false color, the six panels present a consistent processing of 13 years of infrared image data from the Visual and Infrared Mapping Spectrometer (VIMS) on board the Cassini spacecraft orbiting Saturn from 2004 to 2017. They offer a stunning comparison with Cassini's visible light view. NASA's revolutionary rotorcraft mission to Titan's surface is due to launch no earlier than July, 2028.

Escheckstraße (with mast of a T-bar lift), Schönwald im Schwarzwald, Baden-Württemberg, Germany.

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

A Feather from an Angel
Floats gently down to earth,
Announcing the demise
Of another mortal life,
Portending the finality
That awaits all of us.

Aaron Burden on Unsplash

Luke van Zyl on Unsplash

NASA Astronomy Picture of the Day:

Near the heart of the Virgo Galaxy Cluster, a string of galaxies known as Markarian's Chain stretches across this telescopic field of view. Anchored in the frame at bottom right by prominent lenticular galaxies, M84 (bottom) and M86, you can follow the chain's gentle arc up and toward the left. Near center you'll spot the pair of interacting galaxies NGC 4438 and NGC 4435, known to some as Markarian's Eyes. An estimated 50 million light-years distant, the Virgo Cluster itself is the nearest galaxy cluster. With up to about 2,000 member galaxies, it has a noticeable gravitational influence on our own Local Group of Galaxies. Within the Virgo Cluster at least seven galaxies in Markarian's Chain appear to move coherently, while others may appear to be part of the chain by chance.

Photo by Chuck Ayoub

View of the coastal artillery site Castillitos, Cartagena, Spain. It was built together with the coastal artillery Cenizas in order to protect the entrance to the Bay of Cartagena in the Mediterranean Sea. The construction took place between 1933 and 1936 following a project from 1926 during the dictatorship of Primo de Rivera. It's a Spanish National Heritage Monument since 1985.

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

George Washington  (1732 - 1799). First President of the United States.  Biography

Jongsun Lee on Unsplash

"Finally I got this small fast, yellow goldfinch"

NASA Astronomy Picture of the Day:

Have you ever thought about surfing on an alien world? We can now expand the search for the perfect wave from Earth to the rest of the Solar System, and beyond. Scientists have developed a new model for simulating waves on other planets. Titan is one of the 274 confirmed moons of Saturn to date, and the only object in the solar system (besides Earth) known to have liquid lakes and seas on its surface. The featured video shows a simulation of waves on Earth (right) and on Titan (left), under the same conditions (the scale marker is in meters). A light breeze would create taller, slower-moving waves on Titan than on Earth, because the lakes there are filled with light liquid hydrocarbons, and because of Titan's low gravity and higher atmospheric pressure. In a couple of years, NASA expects to launch the Dragonfly mission, which will travel for 6 years and send a rotorcraft to explore Titan and study its microbial habitability.

Watch NASA's Astronomy Video of the Day

Prinia socialis (Ashy Prinia) in Ajodhya Hills, West Bengal, India.

Tisha Mukherjee, CC BY-SA 4.0, via Wikimedia Commons. View source.