spaceexp:

Milky Way over Freycinet National Park 26 photo panoramic Source: corymarshall (flickr)

spaceexp:

Milky Way over Freycinet National Park 26 photo panoramic

Source: corymarshall (flickr)

science-junkie:

Let me introduce… The names of galaxies

The names of astronomical objects, and therefore of galaxies, are generally composed of letters and numbers, only the most renowned of them have a proper noun. The letters refer to the catalogues in which they are listed, while the numbers indicate the object’s entry in the catalogue. This is why a galaxy can have multiple names, for example, the Andromeda Galaxy is also known as M31 or NGC 224.
Some of the most common catalogues are:

  • M (Messier): A catalogue compiled by Charles Messier and several colleagues in the eighteenth century. In this catalogue there are many of the brightest and most remarkable objects, including nebulae and star clusters.
  • NGC/IC (New General Catalogue) / (Index Catalogue): The catalogue, compiled by JLE Dreyer from the 1860s-1880s, includes —in addition to star clusters and nebulae— about 10,000 of the most important galaxies and the first collection of astronomical photographs. Until recently, almost all the known galaxies belonged to this catalogue.
  • Arp: In 1966, Halton Arp  published the Atlas of Peculiar Galaxies, which contains 338 galaxies in total. The main purpose of the catalogue was to present photographically examples of different types of unusual galaxies’ structures. It was therefore a tool to facilitate the work of understanding what determines the form of elliptical or spiral galaxies.
  • UGC (Uppsala General Catalogue): It contains data for 12,921 galaxies north of declination = -2° 30’. The catalogue was published in 1973 by Peter Nilsson, classifying objects by location, size, orientation, and magnitude from Palomar Sky Survey photographs.

Other names, instead, refer to a survey name and the object’s coordinates. The digits, therefore, indicate the right ascension and declination (RA+/-DEC) or (α+/-δ) —either for epoch 1950 or 2000.
In this case some of the most common catalogues are: 

  • PKS: Radio sources from the Parkes radio telescope (i.e. PKS 0521-36).
  • IRAS: Infrared Astronomical Satellite (i.e. IRAS 09104+4109).

All the other data (whether they are numbers, letters, initials or abbreviation) are explained in the introductory part of each catalogue.
You can find the catalogue listing the beautiful Galactic Rose here.

Contacted by Shannon
Image Credit: NASA, ESA, and the Hubble Heritage Team.

faithbeforefear:

Daily titan.

faithbeforefear:

Daily titan.

drxgonfly:

Camping under the Northern Lights (by Bryan Hansel)

drxgonfly:

Camping under the Northern Lights (by Bryan Hansel)

Sorry for all the warning tags. If you follow me and have either migraines or epilepsy, know that I tag flashing gifs with both “migraine warning” and “epilepsy warning”.

Sorry for all the warning tags. If you follow me and have either migraines or epilepsy, know that I tag flashing gifs with both “migraine warning” and “epilepsy warning”.

sixpenceee:

Krista and Tatiana Hogan are craniopagus twins, meaning they’re connected at the head.

They share a structure that connects Krista’s thalamus to Tatiana’s. The thalamus is a double-lobed organ that plays important roles in processing sensory input and creating consciousness.

Since Krista’s and Tatiana’s thalami are connected, scientists and members of the Hogan family think the girls might view the world differently than the rest of us do.

For example, Dr. Cochrane believes the girls can see through each other’s eyes. He came to this conclusion after covering Krista’s eyes, placing electrodes on her head, and watched Krista’s brain respond after shining a light in Tatiana’s pupils.

Other times, one girl will be watching TV while the other is looking somewhere else. Suddenly, the twin not watching TV will start laughing at what’s happening onscreen.

Their “thalamic bridge” also affects their sense of taste. Krista is a ketchup fiend, but Tatiana hates the stuff. Once, Krista was eating ketchup, and Tatiana furiously tried to wipe it off her own tongue even though she wasn’t eating any ketchup herself.

Perhaps the strangest phenomenon of all is that the twins sometimes use the word “I” to describe both of themselves at once.

As of 2011, no one had run any conclusive tests on the girls and their odd condition. However, scientists who have observed their behavior and brain scans are flabbergasted and excited. While no one can say for sure at the moment, it really does seem Krista and Tatiana can share private thoughts and perceive what the other is sensing.

As someone who wants to study consciousness in the future, I can say this is one of the most extraordinary cases I have ever heard of. 

SOURCE

MORE WOW SCIENCE

Dolphins see themselves in a mirror

everyone should stop and reblog dolphins in a mirror

Dolphin: NO WONDER THE ICE CAPS ARE MELTING. IM FUCKIN HOT.

sassy dolphins.

gho57x90:

eunnieboo:

yeah

True.

My students. -_-;;;

splendidcolor:

jordyngryphon:

theguilteaparty:

bookerdewitt:

pamplemoose:

angelphile:

hiddlesbatchlove:

best marketing

A+

10/10

would recommend

WHEREDOTHEYSELLTHOSE?! I need them so bad. This is absolutely perfect.

They sell them at Target

This is a fantastic idea.

Raging pharmacology boner.

Bonus points for being single chemical pills.

you should check out their website! http://www.helpineedhelp.com

If you think that packaging is brill, wait until you see the site.

This company is a marketer’s wet dream.

That website is fantastic. Seriously, click on it and check out the whole site. Best waste of time EVER.

katkinkat:

*forgets to talk to friends for 4 weeks*

thenewenlightenmentage:

What Does Sound Look Like?
When light passes between areas of different air density, it bends. You’ve probably noticed the way distant pavement seems to shimmer on a hot day, or the way stars appear to twinkle. You’re seeing light that has been distorted as it passes through varying air densities, which are in turn created by varying temperatures and pressures.
In the mid-19th century, German physicist August Toepler invented a photography technique called Schlieren Flow Visualization to visually capture these changes in density. The setup is a bit hard to explain in words (watch the video above for a full explanation) but it allows scientists and engineers to see things that are normally invisible: the rising heat from a candle, the turbulence around an airplane wing, the plume of a sneeze.
Continue Reading

thenewenlightenmentage:

What Does Sound Look Like?

When light passes between areas of different air density, it bends. You’ve probably noticed the way distant pavement seems to shimmer on a hot day, or the way stars appear to twinkle. You’re seeing light that has been distorted as it passes through varying air densities, which are in turn created by varying temperatures and pressures.

In the mid-19th century, German physicist August Toepler invented a photography technique called Schlieren Flow Visualization to visually capture these changes in density. The setup is a bit hard to explain in words (watch the video above for a full explanation) but it allows scientists and engineers to see things that are normally invisible: the rising heat from a candle, the turbulence around an airplane wing, the plume of a sneeze.

Continue Reading

Thank you for all the notes on the eclipse photo! (^∇^)