Etiqueta: #rs

Perseid Fireball and Persistent Train

Before local midnight on August 12, this brilliant Perseid meteor flashed above the Poloniny Dark Sky Park, Slovakia, planet Earth. Streaking beside the summer Milky Way, its initial color is likely due to the shower meteor’s characteristically high speed. Moving at about 60 kilometers per second, Perseid meteors can excite green emission from oxygen atoms while passing through the thin atmosphere at high altitudes. Also characteristic of bright meteors, this Perseid left a lingering visible trail known as a persistent train, wafting in the upper atmosphere. Its development is followed in the inset frames, exposures separated by one minute and shown at the scale of the original image. Compared to the brief flash of the meteor, the wraith-like trail really is persistent. After an hour faint remnants of this one could still be traced, expanding to over 80 degrees on the sky. [via NASA] https://ift.tt/2Bkgnn6
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Parker vs Perseid

The brief flash of a bright Perseid meteor streaks across the upper right in this composited series of exposures made early Sunday morning near the peak of the annual Perseid meteor shower. Set up about two miles from Space Launch Complex 37 at Cape Canaveral Air Force Station, the photographer also captured the four minute long trail of a Delta IV Heavy rocket carrying the Parker Solar Probe into the dark morning sky. Perseid meteors aren’t slow. The grains of dust from periodic comet Swift-Tuttle vaporize as they plow through Earth’s upper atmosphere at about 60 kilometers per second (133,000 mph). On its way to seven gravity-assist flybys of Venus over its seven year mission, the Parker Solar Probe’s closest approach to the Sun will steadily decrease, finally reaching a distance of 6.1 million kilometers (3.8 million miles). That’s about 1/8 the distance between Mercury and the Sun, and within the solar corona, the Sun’s tenuous outer atmosphere. By then it will be traveling roughly 190 kilometers per second (430,000 mph) with respect to the Sun, a record for fastest spacecraft from planet Earth. [via NASA] https://ift.tt/2vMpgAH

Launch of the Parker Solar Probe

When is the best time to launch a probe to the Sun? The now historic answer — which is not a joke because this really happened this past weekend — was at night. Night, not only because NASA’s Parker Solar Probe’s (PSP) launch window to its planned orbit occurred, in part, at night, but also because most PSP instruments will operate in the shadow of its shield — in effect creating its own perpetual night near the Sun. Before then, years will pass as the PSP sheds enough orbital energy to approach the Sun, swinging past Venus seven times. Eventually, the PSP is scheduled to pass dangerously close to the Sun, within 9 solar radii, the closest ever. This close, the temperature will be 1,400 degrees Celsius on the day side of the PSP’s Sun shield — hot enough to melt many forms of glass. On the night side, though, it will be near room temperature. A major goal of the PSP’s mission to the Sun is to increase humanity’s understanding of the Sun’s explosions that impact Earth’s satellites and power grids. Pictured is the night launch of the PSP aboard the United Launch Alliances’ Delta IV Heavy rocket early Sunday morning. [via NASA] https://ift.tt/2wasUDP

M86 in the Central Virgo Cluster

Is there a bridge of gas connecting these two great galaxies? Quite possibly, but it is hard to be sure. M86 on the upper left is a giant elliptical galaxy near the center of the nearby Virgo Cluster of galaxies. Our Milky Way Galaxy is falling toward the Virgo Cluster, located about 50 million light years away. To the lower right of M86 is unusual spiral galaxy NGC 4438, which, together with angular neighbor NGC 4435, are known as the Eyes Galaxies (also Arp 120). Featured here is one of the deeper images yet taken of the region, indicating that red-glowing gas surrounds M86 and seemingly connects it to NGC 4438. The image spans about the size of the full moon. It is also known, however, that cirrus gas in our own Galaxy is superposed in front of the Virgo cluster, and observations of the low speed of this gas seem more consistent with this Milky Way origin hypothesis. A definitive answer may come from future research, which may also resolve how the extended blue arms of NGC 4435 were created. [via NASA] https://ift.tt/2KUXHts

The Pencil Nebula in Red and Blue

This shock wave plows through interstellar space at over 500,000 kilometers per hour. Near the top and moving up in this sharply detailed color composite, thin, bright, braided filaments are actually long ripples in a cosmic sheet of glowing gas seen almost edge-on. Cataloged as NGC 2736, its elongated appearance suggests its popular name, the Pencil Nebula. The Pencil Nebula is about 5 light-years long and 800 light-years away, but represents only a small part of the Vela supernova remnant. The Vela remnant itself is around 100 light-years in diameter, the expanding debris cloud of a star that was seen to explode about 11,000 years ago. Initially, the shock wave was moving at millions of kilometers per hour but has slowed considerably, sweeping up surrounding interstellar material. In the featured narrow-band, wide field image, red and blue colors track the characteristic glow of ionized hydrogen and oxygen atoms, respectively. [via NASA] https://ift.tt/2MlG6Ql

Meteor before Galaxy

What’s that green streak in front of the Andromeda galaxy? A meteor. While photographing the Andromeda galaxy in 2016, near the peak of the Perseid Meteor Shower, a sand-sized rock from deep space crossed right in front of our Milky Way Galaxy’s far-distant companion. The small meteor took only a fraction of a second to pass through this 10-degree field. The meteor flared several times while braking violently upon entering Earth’s atmosphere. The green color was created, at least in part, by the meteor’s gas glowing as it vaporized. Although the exposure was timed to catch a Perseids meteor, the orientation of the imaged streak seems a better match to a meteor from the Southern Delta Aquariids, a meteor shower that peaked a few weeks earlier. Not coincidentally, the Perseid Meteor Shower peaks again tonight. [via NASA] https://ift.tt/2M7Uaxv

Red Planet Red Moon and Mars

Mars is also known as The Red Planet, often seen with a reddish tinge in dark night skies. Mars shines brightly at the upper left of this gorgeous morning twilight view from Mornington Peninsula, Victoria, Australia, but the Moon and planet Earth look redder still. Taken on July 27, the totally eclipsed Moon is setting. It looks reddened because the Earth’s umbral shadow isn’t completely dark. Instead Earth’s shadow is suffused with a faint red light from all the planet’s sunsets and sunrises seen from the perspective of an eclipsed Moon. The sunsets and sunrises are reddened because Earth’s atmosphere scatters blue light more strongly than red, creating the faint bluish twilight sky. Of course, craggy seaside rocks also take on the reddened colors of this Australian sunrise. [via NASA] https://ift.tt/2Mf7iA0

Live: Cosmic Rays from Minnesota

Cosmic rays from outer space go through your body every second. Typically, they do you no harm. The featured image shows some of these fast moving particles as streaks going through Fermilab’s NOvA Far Detector located in Ash River, Minnesota, USA. Although the image updates every 15 seconds, it only shows cosmic rays that occurred over a (changing) small fraction of that time, and mostly shows only one type of particle: muons. The NOvA Far Detector’s main purpose is not to detect cosmic rays, though, but rather neutrinos from the NuMI beam shot through the Earth from Fermilab near Chicago, Illinois, USA, 810 kilometers away. Only a few neutrino events are expected in NOvA per week, though. The NuMI / NOvA experiment is allowing humanity to better explore the nature of neutrinos, for example how frequently they change type during their trip. Cosmic rays themselves were discovered only about 100 years ago and can not only alter computer memory, but may have helped to create DNA mutations that resulted in, eventually, humans. [via NASA] https://ift.tt/2vnfeFR

YouTubeando: Queen & George Michael – Somebody to Love (The Freddie Mercury Tribute Concert)

Queen & George Michael – Somebody to Love (The Freddie Mercury Tribute Concert)
via YouTube https://youtu.be/UvM2Cmi-YRU

DVD: https://ift.tt/2OIY913
Blu-Ray: https://ift.tt/2AJrpSr
Digital: https://ift.tt/2OIYaSF
Net Proceeds from the sale of this release will be paid to the Mercury Phoenix Trust -Fighting AIDS worldwide.
On April 20th 1992, Roger Taylor, Brian May and John Deacon, the surviving members of Queen, took to the stage at Wembley Stadium for the start of one of the biggest events in rock history, which the band had organised to pay tribute to their former colleague — the incomparable Freddie Mercury. Queen were joined by some of the greatest musical talent in the world to celebrate Freddie’s life and work and to increase public awareness of AIDS, the disease that had prematurely ended his life the previous year. As well as being great entertainment, the concert raised a huge and still growing sum of money for the Mercury Phoenix Trust, a charity formed at the time whose charter is the relief of suffering from AIDS throughout the world. Now for the first time both halves of the concert are being made available on Digital video.

Special guests include David Bowie, Gary Cherone, Roger Daltrey, Def Leppard, Joe Elliot, Extreme, Bob Geldof, Guns ‘n’ Roses, James Hetfield, Ian Hunter, Tony Iommi, Elton John, Annie Lennox, Metallica, George Michael, Liza Minnelli, Robert Plant, Mick Ronson, Axl Rose, Seal, Slash, Lisa Stansfield, Elizabeth Taylor, Paul Young & Zucchero.

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YouTubeando: Queen – Live at LIVE AID 1985/07/13 [Best Version]

Queen – Live at LIVE AID 1985/07/13 [Best Version]
via YouTube https://youtu.be/A22oy8dFjqc

This is the absolute ULTIMATE experience of Queen’s set at LIVE AID, this is the best video mixed to the absolutely superior stereo radio broadcast. This vastly superior audio mix takes a huge dump on all of the official mixes. Best viewed in 1080p. ENJOY! ***MAKE SURE TO READ THE DESCRIPTION***
00:36 – Bohemian Rhapsody
02:42 – Radio Ga Ga
06:53 – Ay Oh!
07:34 – Hammer To Fall
12:08 – Crazy Little Thing Called Love
16:03 – We Will Rock You
17:18 – We Are The Champions
21:12 – Is This The World We Created…?

Short song analysis:

– «Bohemian Rhapsody»: Although it’s a short medley version, it’s one of the best performances of the ballad section, with Freddie nailing the Bb4s with the correct studio phrasing (for the first time ever!).

– «Radio Ga Ga»: Although it’s missing one chorus, this is one of – if not the best – the best versions ever, Freddie nails all the Bb4s and sounds very clean! Spike Edney’s Roland Jupiter 8 also really shines through on this mix, compared to the DVD releases!

– «Audience Improv»: A great improv, Freddie sounds strong and confident. You gotta love when he sustains that A4 for 4 seconds!

– «Hammer To Fall»: Despite missing a verse and a chorus, it’s a strong version (possibly the best ever). Freddie sings the song amazingly, and even ad-libs a C#5 and a C5! Also notice how heavy Brian’s guitar sounds compared to the thin DVD mixes – it roars!

– «Crazy Little Thing Called Love»: A great version, the crowd loves the song, the jam is great as well! Only downside to this is the slight feedback issues.

– «We Will Rock You»: Although cut down to the 1st verse and chorus, Freddie sounds strong. He nails the A4, and the solo from Dr. May is brilliant!

– «We Are the Champions»: Perhaps the high-light of the performance – Freddie is very daring on this version, he sustains the pre-chorus Bb4s, nails the 1st C5, belts great A4s, but most importantly: He nails the chorus Bb4s, in all 3 choruses! This is the only time he has ever done so! It has to be said though, the last one sounds a bit rough, but that’s a side effect of belting high notes for the past 18 minutes, with nodules AND laryngitis!

– «Is This The World We Created… ?»: Freddie and Brian perform a beautiful version of this, and it is one of the best versions ever. It’s both sad and hilarious that a couple of BBC engineers are talking over the song, one of them being completely oblivious of the fact that he is interrupting the performance, on live television… Which was being televised to almost 2 billion homes.

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