- Tachyons :These are particles which go faster than c — this does not violate relativity as long as they never decelerate to subluminal speeds. ...
- Gluons: These are massless, and though they don't occur freely (except possibly in glueballs, though these most probably have mass) they do travel at c. ...
- Neutrinos: Now these are viable candidates. ...
What are the particles that are produced by black holes?
Another ubiquitous class of objects are relativistic jets, which are ultrarelativistic streams of plasma, produced mainly when some accretion onto a black hole is taking place. Particles in such jets move at highly relativictic velocities, though the exact nature of jet formation is yet not completely understood. Finally, there is plenty of relativistic particles present in the background, such as cosmic ray particles and neutrinos.
Why are galaxies moving away from us faster than light?
Indeed, there are some galaxies that are moving away from us faster than light ( the only reason we see them is that they used to be closer and moving at a slower speed ). Any pair of galaxies that are 4200 Mpc away from each other (that is, with a redshift of 1.4), are moving away from each other faster than light in each other's frames ...
How fast do hypervelocity stars go?
The fastest hypervelocity stars are supposed to go about 900km/s 2million mph https://www.space.com/19748-hypervelocity-stars-milky-way.html
What temperature do plasmas have?
One last thing to mention would be plasmas which are at relativistic temperatures (of order 10 9 K ), and which hence contain particles (mainly, electrons) moving relativistically. It is rare that plasmas get temperatures that high, but it is definitely possible during core-collapse supernova.
Why are there no longer visible galaxies?
1. Due to cosmic expansion, there can be galaxies that are no longer visible to us. Some galaxies may never have been visible to us, if we start watching from when galaxies started forming.
What is the fastest mass in the universe?
Even though we are speaking about the spin speed, nonetheless at 2 million miles across, this NGC 1365 black hole with mass is assuredly the fastest velocity mass we know about in the universe, right?
What happens when a black hole spins?
Stuff spiraling around spinning black holes: Black holes have a strong gravitational field, and when rotating, they can impart angular momentum (lots of it) to nearby objects like accretion disks. Objects close to a black hole are accelerated to pretty high speeds. In fact, if an object is within the ergosphere, it moves faster than light from the point of view of certain frames of reference.
What does dithering the mount and processing algorithms do?
Dithering the mount and processing algorithms will allow us to eliminate the unwanted streaks caused by the passage of satellites and space junk.
What is the navigational light of a plane?
Planes blink and satellites flare. At least one of the navigational lights of a plane is almost always visible through a scope . With a low horizon, a plane flying toward you is headlights aimed right at you. Magnification shows the navigational lights nonetheless.
Which satellites are close enough to show structure?
The only satellites that are close and big enough to easily show structure are the ISS and spy satellites . A few pieces of junk are big enough to make out shapes when they pass in front of the lit Moon. Those can still be chased, but can hardly be mistaken for a plane.
How fast do meteors come from the Northern Taurids?
Meteors from the Northern Taurids shower, which appear worldwide from October 13 to December 2 annually, will reach a maximum rate of about 5 per hour on Friday, November 12. The long-lasting, weak shower is the second of two consecutive showers derived from debris dropped by the passage of periodic Comet 2P/Encke. The larger-than-average grain sizes of the comet’s debris often produce colorful fireballs. The best viewing time will occur at around 1 a.m. local time on Friday, when the shower’s radiant, located in northwestern Taurus, will be highest in the southern sky. At this year’s peak, a first quarter moon will set by midnight, favoring more meteors. Keep an eye out for Northern Taurids on Thursday evening, too.
What is the moon's phase in November?
The November Full Moon, traditionally known as the Beaver Moon or Frost Moon, always shines in or near the stars of Taurus and Aries. The moon will reach its full phase, directly opposite the sun in the western pre-dawn sky, at 3:57 a.m. EST or 8:57 GMT on Friday, November 19. At that time it will be passing through Earth’s round shadow, or umbra, producing the second lunar eclipse of 2021. At maximum eclipse, at 4:02:56 a.m. EST or 09:02:56 GMT, a thin sliver of the moon’s southern rim will remain outside of the shadow, making this a partial lunar eclipse. The rest of the moon will darken to a ruddy red color - especially the moon’s northern half. The moon will first contact the umbra at 2:18:41 a.m. EST or 7:18:41 GMT and will last touch it 3hours 28minutes later, at 5:47:04 a.m. EST or 10:47:04 GMT. You should notice a slight darkening of the moon while it traverses the zone encircling the umbra, both after 1:02 a.m. and before 7:04 a.m. EST. The entire eclipse will be visible from North America and nearly all of the Pacific Ocean. Eastern Asia, Australia, New Zealand, and Japan will miss the early stages, while South America and western Europe will miss the final stages.
What planets are visible on July 11?
Low in the west-northwestern sky after sunset on Sunday, July 11, the young crescent moon will shine a generous palm’s width to the right (or 6.5 degrees to the celestial northwest) of two planets - bright Venus and much fainter Mars.
How long does the moon stay unobservable?
Since sunlight can only reach the far side of the moon, and the moon is in the same region of the sky as the sun, the moon becomes unobservable from anywhere on Earth for about a day (except during a solar eclipse). After the new moon phase Earth’s celestial night-light will return to shine in the western evening sky.
How many galaxies are in the Virgo cluster?
The Virgo Cluster contains as many as 2,000 galaxies — dozens of which are visible with amateur telescopes under dark sky conditions during spring evenings. The cluster spans nearly a fist's diameter (8 degrees) of sky on the border between Virgo and Coma Berenices. The brightest member is the elliptical galaxy Messier 49, which is located a generous palm's width to the lower right (or 8.5 degrees to the celestial southwest) of the bright star Vindemiatrix (Epsilon Virginis). Using low magnification, aim your telescope mid-way between Vindemiatrix and the bright star Denebola (Beta Leonis). That region contains a large number of bright galaxies, including the Messier objects M84 and M86 through M91. Markarian's Chain is a spectacular, curved line of galaxies spanning 1.5 degrees. It arcs to the upper left (celestial north) from M84.
How big is Jupiter's disk in July?
Telescope views of Jupiter during July will show its large, banded disk increasing in apparent diameter from 45.3 to 48.4 arc-seconds.
What is the best time to see Mercury in 2021?
After sunset throughout the month of May, 2021 Mercury will be easily visible by Northern Hemisphere observers while it travels on the high side of a nearly vertical evening ecliptic plane. The speedy planet will climb away from the sun until mid-month, when it will be at peak visibility. In the second half of the month Mercury will descend sunward, passing much brighter and slower Venus near month-end. As the sky grows darker each night, look for Mercury low in the west-northwest as a white point of light shining some distance above Venus. Since the planet will be traversing the space between us and the sun, telescope views of Mercury in May will show that its disk is growing larger while waning in illuminated phase (inset).
