[helter]

Three Parts Of the Night Sky


6a0105371bb32c970b01bb09815d2e970d.jpg (140.76 kB . 1500x994 - viewed 13686 times)

Photographer: Marcelo Zurita
Summary Authors: Marcelo Zurita; Jim Foster

In this one photo I was able to capture cloud-to-cloud lightning (at bottom), a starry sky above the storm clouds and a dazzling meteor. It was taken from a rural area in Brazil's eastern-most state of Paraiba. My attention was actually on the distant storm on the horizon but as I snapped the shutter a meteor passed through the field of view. The lightning is at an altitude of perhaps 40,000 ft (12,192 m); the meteor is streaking by 70 mi (112 km) or so above the Earth's surface; the brightest star in the frame, Menkar (at upper right center in the constellation of Cetus), lies approximately 250 light years from our solar system.

Photo Details: Camera Model: NIKON D5100; Focal Length: 14.0mm (35mm equivalent: 21mm); Aperture: ƒ/5.0; Exposure Time: 30.000 s; ISO equiv: 800; Software: GIMP 2.8.14.

Great shot!

[BspeedN]

Temperature distribution of a Mosquito..

[neilep]

Storm in the Desert   


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Big Bend National Park, TX 3 June 2017 On a solo circum-country road trip camped on the desert floor I watched a nasty storm move left to right across the horizon. It was powerful and scary and magnificent! North of Chisos mtns, facing E
 
 8 second exp, f/2.8 ISO400 50mm Canon 5DMkII Increased the vib & sat to better reflect the colors the weird light was producing, clarity to bring out the depth in the clouds I was seeing. I didn't notice I'd also caught the stars until I got it on the laptop.

CREDIT: NATIONAL GEOGRAPHIC

[Tomassci]

Here is microimage of small magnetite:
20180529_131558_1024x1365.jpg (623.67 kB . 1024x1365 - viewed 4713 times)
Here is the same in real scale:
20180528_191248_1024x1074_768x805_600x628.jpg (272.41 kB . 600x628 - viewed 4697 times)

That piece is propably magnetite with other chemicals.
Magnetite is magnetic, because of its high amount of iron. In fact, it's so high, it's source of iron #1.
(Source of images:me, info: https://www.thenakedscientists.com/forum/index.php?topic=73413.msg543320#msg54332

Biomagnetism is usually related to the presence of biogenic crystals of magnetite, which occur widely in organisms.These organisms range from bacteria (e.g., Magnetospirillum magnetotacticum) to animals, including humans, where magnetite crystals (and other magnetically-sensitive compounds) are found in different organs, depending on the species.Biomagnetites account for the effects of weak magnetic fields on biological systems.There is also a chemical basis for cellular sensitivity to electric and magnetic fields (galvanotaxis).
Source: wikipedia, magnetite

[BspeedN]

Purple or blue? A new optical illusion study finds that your answer will change based on your expectations.

[Liz888]

Super!

[rami999]

wow such an active world

[elinasophos]

fruitful suggestions.

[Stephbaker]

African Skull Fills Gap, Fuels Debate


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Remains of the hominids that lived in Africa between a million and half a million years ago are frustratingly rare in the fossil record. Bones from this time period have been recovered in Europe and Asia, but the paucity of finds from Africa has prevented a full understanding of just what members of the species Homo erectus looked like. Indeed, some paleontologists posit that hominids from this time period should be divided into multiple lineages, whereas others suggest that there was simply wide variation within H. erectus. A discovery described today in the journal Science is helping to fill the fossil gap.
Richard Potts of the National Museum of Natural History in Washington, D.C., and his colleagues found 11 fragments of a single hominid skull during excavations at an archaeological site in Olorgesailie, Kenya. Together these finds mark the first discovery of ancient human bone at the site since exploration began in 1942. Based on radiometric dating and sedimentary evidence, the team estimates that the fossil is between 900,000 and 970,000 years old. The skull is from an adult or near-adult and shares some features with H. erectus. If it is a member of this species, it is a very petite representative. The researchers note that it is the smallest individual yet known from the time interval spanning 1.7 million and half a million years ago. Because many of the tools recovered from the same site are large and would have required significant strength and size to handle, Potts and his collaborators conclude that there was wide physical variation in the population to which this hominid belonged, with both large and small individuals present.
Other researchers interpret the new find differently, however. “[The skull] doesn't look like anything else we know so far,” contends Jeffrey H. Schwartz of the University of Pittsburgh, who penned an accompanying commentary in Science. He argues that a number of the fossils categorized as H. erectus show too much variation from the original, or type, H. erectus skull discovered in the late 19th century in Java to be considered members of the same species.

SOURCE SCIENTIFIC AMERICAN.COM

Men are the same as women...just inside out !

Wow, this is such a nice one! Thanks for sharing this. I totally enjoyed reading this post

[agniveda123]

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[nicephotog]

Australian native bee macro - 2019 - Tetragonula carbonaria or similar 4mm approximately (exact numbers of native Australian bee species is cited spuriously throughout all journals and persons)


Macro (crop) - of microscopic Native Australian bee (some Tetronogula type) 3 to 4mm long on a wildflower - Feb 2019 coastal NSW forest by Samuel Marchant, on Flickr

https://flic.kr/p/SSBgvs  1508 x 2026

[neilep]

Supernova Cannon Expels Pulsar J0002

Image Credit: F. Schinzel et al. (NRAO, NSF), Canadian Galactic Plane Survey (DRAO), NASA (IRAS); Composition: Jayanne English (U. Manitoba)Explanation: What could shoot out a neutron star like a cannon ball? A supernova. About 10,000 years ago, the supernova that created the nebular remnant CTB 1 not only destroyed a massive star but blasted its newly formed neutron star core -- a pulsar -- out into the Milky Way Galaxy. Traveling over 1,000 kilometers per second, the pulsar PSR J0002+6216 (J0002 for short) has already left the supernova remnant CTB 1, and is even fast enough to leave our Galaxy. Pictured, the trail of the pulsar is visible extending to the lower left of the supernova remnant. The featured image is a combination of radio images from the VLA and DRAO radio observatories, as well as data archived from NASA's orbiting IRAS infrared observatory. It is well known that supernovas can act as cannons, and even that pulsars can act as cannonballs -- what is not known is how supernovas do it.

[neilep]

[martingail11]

I learnt a lot about science factors from these images. All the images not relate to each other but say a lot about different sections.