At this point I’m sure you’ve heard about the Tornado in Oklahoma yesterday. Here’s the hook echo from that storm.
At this point I’m sure you’ve heard about the Tornado in Oklahoma yesterday. Here’s the hook echo from that storm.
Some male Hooded Mergansers (Lophodytes cucullatus) showcasing their ‘impressive’ mating displays.
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On the Gorham Campus of the University of Southern Maine sits the Robie-Andrews Dormitory. The university was established in the late 19th century, originally as an all-girls college. The Gorham campus as a whole has experienced a wide variety of paranormal events and strange occurrences. Students have reported cold spots or rooms that remain oddly cool in several locations, as well as lights, TV’s and radios flickering on and off and clocks resetting before their eyes. Most of these events are harmless annoyances to USM students.
Photos From The Museum Of Moving Image; Horror Movies:
All my horror-loving followers, here are some actual props and prosthetic piece(s) I saw at the Museum Of Moving Image.1. The original claw Freddy Krueger wore in Nightmare on Elm Street, along with his ripped sweater and prosthetic piece. (I think the 3rd film)
2. The animatronic of Regan from The Exorcist (From the head-spinning scene, as you can tell by the clear separation of her neck and shoulders.
3. The prosthetic legs of a character from Black Swan, which I haven’t seen yet.
Black-body radiation
When astronomers refer to the temperature of a star, they are talking about the temperature of the gases in the photosphere, and they express those temperatures on the Kelvin temperature scale. On this scale, zero degrees Kelvin (written 0 K) is absolute zero (2273.2°C or 2459.7°F), the temperature at which an object contains no thermal energy that can be extracted. Water freezes at 273 K and boils at 373 K (at sea-level atmospheric pressure). The Kelvin temperature scale is useful in astronomy because it is based on absolute zero and consequently is related directly to the motion of the particles in an object.
Now you can understand why a hot object glows, or to put it another way, why a hot object emits photons, bundles of electromagnetic energy. The hotter an object is, the more motion there is among its particles. The agitated particles, including electrons, collide with each other, and when electrons accelerate—change their motion—part of the energy is carried away as electromagnetic radiation. The radiation emitted by a heated object is called black-body radiation, a name translated from a German term that refers to the way a perfectly opaque object would behave. A perfectly opaque object would be both a perfectly efficient absorber and a perfectly efficient emitter of radiation. At room temperature, such a perfect absorber and emitter would look black, but at higher temperatures it would glow at wavelengths visible to a human eye. That explains why in astronomy and physics contexts you will see the term black-body referring to objects that glow brightly.
Black-body radiation is quite common. In fact, it is responsible for the light emitted by an incandescent light bulb. Electricity flowing through the filament of the bulb heats it to high temperature, and it glows. You can also recognize the light emitted by hot lava as black-body radiation. Many objects in the sky, including the sun and other stars, primarily emit black-body radiation because they are mostly opaque.
Credit: Michael A. Seeds, Dana E. Backman
Gif credit: caucasianmale
Charted: Extraterrestrial Driving Records
NASA has just released this cute chart depicting the various distances traveled by wheeled machines on other worlds (click to enlarge).
The comparison was put out in honor of the agency’s Opportunity rover, which has been on Mars since 2004, beating NASA’s previous distance record-holder, the Apollo 17 moon buggy. During its nine years of operations, Opportunity has roved 35.760 kilometers, edging out the Apollo astronaut’s 35.744-kilometer drive.
The champion for driving on another surface still goes to the Soviet Lunokhod 2 rover, which traveled 37 kilometers across the moon in 1973. Of course, Opportunity still has the *ahem* opportunity to overtake the international record holder since it’s continuing to rove around the rim of Endeavour crater on Mars. The little robot has been exploring that area since 2011 and has uncovered some of the most unambiguous evidence for water on ancient Mars. Though NASA’s celebrated Curiosity rover has only gone less than one kilometer since landing in August, it has nuclear batteries that could last 14 years at minimum — ample time to beat all competitors.
Image: NASA/JPL-Caltech
Reflection and Emission Nebulas
— Rho Ophiuchi Cloud ComplexCredit: Gerald Rhemann // Astrostudio
