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Second Interstellar Meteor Discovered and This One Hit the Earth

Second Interstellar Meteor Discovered and This One Hit the Earth 90
Move over, ‘Oumuamua … there’s a new interstellar object in town. Well, there was, according to Abraham (Avi) Loeb, the astronomer who will be forever linked to ‘Oumuamua because of his theory that the cigar-shaped, not-of-this-solar-system object might actually be artificially made – in other words, an interstellar spaceship or solar sail. Despite some ridicule, Harvard didn’t fire the chair of its Astronomy Department and Loeb went back to work … and has now discovered his own interstellar object which predates ‘Oumuamua. Avi, can you give this one a name that’s easier to spell and pronounce?

“I was very surprised. I didn’t expect that. I thought we will not see anything. But in retrospect, like any discovery, you say, Oh yeah, of course. How could I be so foolish not to look for that in the first place?”

“That” is — or was – a meteor that was reported over Manus Island in Papua New Guinea on January 8, 2014. In a paper that has been submitted to The Astrophysical Journal Letters, Loeb and Harvard undergraduate student Amir Siraj describe how they found the report while reviewing the Center for Near-Earth Object Studies’ catalog of meteor events for objects that had two key ingredients indicating they might be from another galaxy – speed and trajectory.

Second Interstellar Meteor Discovered and This One Hit the Earth 91

“We know the motion of the Earth [and] we correct for it—for the gravity of Earth, gravity of the sun, gravity of all the planets.”

Loeb told National Geographic that he and Siraj searched through 30 years of data and found one meteor that had the right combination of both. The meteor was traveling at almost 37 miles per second (134,200 mph or 216,000 km/h) when it disintegrated over Manus Island. That’s too fast to have been slingshot at Earth by a tight loop around the Sun or Jupiter or another planet in the way NASA gives space probes a boost in velocity, which means it was probably fired at us by another star. While there are no pictures of this meteor, the data in the CNEOS catalog indicated an unusual trajectory that, when coupled with its speed, indicated this was most likely an interstellar object that arrived three years before ‘Oumuamua.

“If we identified such a thing in real time, we could take a spectrum and figure out the composition.”

Unfortunately, this one burned up in the atmosphere due to its size — three feet across and weighing about 1,100 pounds. And no, it wasn’t cigar-shaped, so Loeb doesn’t think it was a spaceship. However, it could still have been carrying life forms.

Second Interstellar Meteor Discovered and This One Hit the Earth 92

“You can imagine that if these meteors were ejected from the habitable zone of a star, they could help transfer life from one planetary system to another.”

Panspermia! Loeb thinks most of these interstellar objects are much smaller than ‘Oumuamua (1 km long) and will disintegrate before impacting, but much could be learned by beefing up the NEO detection system to catch more of them as they burn up in the atmosphere so their spectrums can be analyzed for mineral content.

That’s not as exciting as finding an alien spaceship, but Avi Loeb seems well on his way to becoming the go-to astronomer for interstellar objects.

Source: Mysterious Universe

Space

In December, Earth’s inhabitants will be able to see a rare cosmic phenomenon

In December, Earth's inhabitants will be able to see a rare cosmic phenomenon 105

At the end of the year, astronomers expect to see a rare cosmic phenomenon dubbed the “Christmas star” in the sky. It will be caused by the fact that Saturn and Jupiter come close to each other at a minimum distance and almost collide to become one super-bright point of light.

These two planets became one straight line in the solar system a few weeks ago, but at the end of December they will be on it for observers from Earth. This will happen on December 21, 2020, on the day of the winter solstice, when the daylight hours are the shortest and the night is the longest. Jupiter and Saturn will look like a “double planet” for the first time since the Middle Ages, Forbes writes.

“The conjunctions of the two planets are extremely rare, but this particular conjunction is especially rare because the planets will be very close to each other,” Patrick Hartigan, astronomer at Rice University, USA said. “In order to observe a closer conjunction of these planets in the night sky, we would have to return on March 4, 1226.”

It is noted that the unusual celestial phenomenon can be observed from anywhere on the planet. The main thing is that the sky is clear. The “Christmas Star” can be seen in the western sky about an hour after sunset when viewed from the northern hemisphere.

“On the evening of their closest approach, December 21, they will appear as a twin planet, separated by less than 1/5 the diameter of the full moon,” Hartigan said. “For most amateur astronomers looking at the night sky through a telescope, both planets and several of their largest satellites will be in the same field of view this evening.”

In December, Earth's inhabitants will be able to see a rare cosmic phenomenon 106

Those who want to see Jupiter and Saturn converge in the sky as close, but will be higher above the horizon, will have to wait until March 15, 2080, Hartigan said. After that, a similar configuration for this planetary pair will not be observed until 2400.

Astronomers are already preparing equipment to analyze in detail the upcoming event. Everything is very serious, because the second such rapprochement between Jupiter and Saturn cannot be expected.

Of course, there will not be a collision of planets. You just get the impression that something terrible is about to happen in the solar system. Astronomers have assured that there is no reason to worry.

Is the “Christmas Star” an omen of things to come? Mark your calendars! 

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A giant asteroid worth $ 17.4 billion is approaching Earth

A giant asteroid worth $ 17.4 billion is approaching Earth 107

NASA announced the imminent flight of a potentially dangerous asteroid will pass the Earth. The website of the Center for the Study of Near-Earth Objects says that a celestial body ranging in size from 370 to 820 meters will approach the planet on November 29.

The asteroid, consisting of nickel, iron and cobalt, is approaching the Earth. The cost of minerals in its composition reaches $ 17.4 billion, with reference to the Asterank database, which contains data on 600 thousand asteroids.

The distance between the asteroid 153201 (2000 WO107) and the Earth will be more than 4 million kilometers, the Space Reference specified with reference to NASA data. It is noted that the distance from the Earth to the Moon is 10 times less, and the asteroid is considered dangerous because it crosses the orbit of our planet.

According to the NASA Center for the Study of Near-Earth Objects, the celestial body will approach the Earth on November 29. 

It is noted that this time the asteroid does not pose a threat to the planet, however, it belongs to the group of potentially dangerous ones, since its trajectory crosses the Earth’s orbit.

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Space

Intrusive buzzing. The Perseverance rover recorded the space sounds of its flight to Mars

Intrusive buzzing. The Perseverance rover recorded the space sounds of its flight to Mars 108

NASA’s new rover is equipped with a microphone to record sounds during landing on the Red Planet.

NASA’s Perseverance rover, which is en route to Mars, has recorded its flight to the planet.

The new rover is equipped with a microphone designed to record sound when entering the atmosphere, descent and landing. The device should arrive on the Red Planet in February 2021.

But before the rover reached its destination, NASA’s Jet Propulsion Laboratory (JPL) released an audio file recording what the rover “hears” during its interplanetary voyage.

The 60-second recording, posted on SoundCloud, was captured on Oct.19 while checking the rover’s EDL and microphone system.

Experts explain that the buzzing sound comes from a pump that pumps fluid to regulate the rover’s temperature.

NASA compares the new hit for your playlist to the noise you hear on wired headphones when the wire rubs against your clothing. It was these mechanical vibrations that the Perseverance microphone picked up.

“Located at the rear of the starboard side of the Perseverance, the pump is part of the unit’s heat system that maintains operating temperatures for the equipment, even in the coldest locations,” JPL said in a statement.

“I apologize to the person who came up with the slogan for the film” Alien “(” No one in space will hear your scream “- ed.), Perhaps no one will hear the scream, but perhaps a pump to remove heat will be heard,” says a leading engineer at JPL Dave Gruel.

He added that the microphone picks up the hum of the pump through mechanical vibration.

The Perseverance rover is supposed to land on Mars on February 18, 2021 in the Jezero crater – it is believed that a riverbed used to pass through this area. This is one of those places where traces of living organisms on the planet could be preserved.

The main mission of the rover is to detect signs of life in order to advance the study of the ancient history of Mars. In addition, the device will become part of a mission to deliver samples from the surface of the red planet: it will dig out rock at certain points, and then another device will pick them up, which will send them to Earth.

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