Connect with us

Science

A Meteor over Vermont reported by NASA Meteor Watch ends in a bright fireball – Republic TV

Published

 on


A brightly lit meteor sped through the night sky in the US state of Vermont on Sunday, March 7. The meteor created a giant fireball and looked like a big light show over the Vermont skies. Read further ahead to know more details.

A Meteor Over Vermont Spotted on Sunday, March 7

As reported by livescience.com, the meteor produced a loud shaking boom as it raced through the Earth atmosphere, burning up in the process and making a giant fireball that ended in a meteor shower. The meteor released energy equivalent to blowing up 440 pounds or 200 kilograms of TNT. NASA’s meteor watch reported that the meteor was approximately 10 pounds or 4.5 kilograms in mass and about 6 inches or 15 centimetres in diameter. 

As reported by NASA, the meteor smashed through the atmosphere at a speed of approximately 42,000 miles per hour (68,000 kilometres per hour). The meteor looked like a very bright large fireball and appeared over the northern part of Vermont at 5:38 p.m. EST. A Vermont based local news station received calls where callers said that they heard a very loud boom and body rattling vibrations as the meteor passed over their areas. 

NASA estimates based on eyewitness accounts that the meteor initially appeared 52 miles or 84 kilometres over Mount Mansfield State, east of Burlington. The meteor then travelled through the sky for 33 miles (53 km) northeast, heading towards the Canadian border. The meteor disappeared 33 miles (53 km) over the ground at the south of Newport. As per NASA the loud boom and vibration that the meteor caused as a result of the meteor getting fractured due to the atmospheric pressure. As the 4.5 kg sped through the atmosphere at a very high speed, pressure built up in front of the space rock and a vacuum behind it, resulting in the meteor getting torn to pieces and causing a meteor shower. 

What are Meteor Showers and How are they Caused? 

Meteor showers happen when Earth in its orbit passes through leftover debris from the comets that have broken up. While the earth’s orbit around the sun if pretty much fixed, comets have an elliptical orbit and often end up very close to the earth’s orbit or enter the atmosphere. The inside of a comet is made up of icy materials and loosely attached rocks. When comets come into the earth’s atmosphere they break up into tiny pieces due to friction and heat and that’s what causes the bright meteor show. The debris completely burns up in the atmosphere if it’s small or lands on the surface of the Earth if the size of the meteor is large enough. 

Let’s block ads! (Why?)



Source link

Continue Reading

Science

A Surprisingly Large Number Of “Stars” You See In The Sky Are Actually Spacecraft – Wonderful Engineering

Published

 on



Thousands of communication satellites are being designed and launched at a rapid pace. These satellites will have a negative impact on observational astronomy research and are likely to significantly disrupt recreational or traditional cultural stargazing.

If you look up in the sky, you might notice a sequence of bright star-like objects moving in a straight line. Those aren’t stars. They’re Starlink satellites, and they’ll soon be even more noticeable in the dark sky.

Samantha Lawler, assistant professor of astronomy at the University of Regina, recently wrote a piece in The Conversation warning that “one out of every 15 points” of light in the sky could someday be a satellite rather than a star. Moreover, she said he also thinks that satellite companies like Elon Musk’s SpaceX’s Starlink will immensely impact space research.

“This will be devastating to research astronomy and will completely change the night sky worldwide,” she wrote.

Lawler’s forthcoming study will be published in The Astronomical Journal, which will show evidence for the adverse stargazing effects of satellite megaconstellations like SpaceX’s.

Given that firms like SpaceX offer internet to locations around the world that might otherwise be without it, Lawler believes that regulatory agencies should limit the number of visible satellites in orbit.

“Our perspective of the stars will soon be changed forever,” she added if that doesn’t happen.

“We can’t accept the global loss of access to the night sky, which we’ve been able to see and connect with for as long as we’ve been human,” she wrote.

Our orbit is clogged with space debris. Starlink’s satellites have to avoid space junk as well. Will legislators intervene to put a stop to it? If prior responses to existential concerns like climate change are any indication, it will be considered later rather than sooner.

Adblock test (Why?)



Source link

Continue Reading

Science

Dinosaur tail found in Chile stuns scientists – Phys.Org

Published

 on


Miniature models of the Stegouros elengassen, a species of dinosaur discovred in Patagonia in 2018, is seen on display December 1, 2021 in Santiago.

Chilean paleontologists on Wednesday presented their findings on a dinosaur discovered three years ago in Patagonia which they said had a highly unusual tail that has stumped researchers

The remains of the Stegouros elengassen were discovered during excavations in 2018 at Cerro Guido, a site known to harbor numerous fossils, by a team who believed they were dealing with an already known species of dinosaur until they examined its .

“That was the main surprise,” said Alexander Vargas, one of the paleontologists. “This structure is absolutely amazing.”

“The tail was covered with seven pairs of osteoderms … producing a weapon absolutely different from anything we know in any dinosaur,” added the researcher during a presentation of the discovery at the University of Chile.

The osteoderms—structures of bony plaques located in the dermal layers of the skin – were aligned on either side of the tail, making it resemble a large fern.

Paleontologists have discovered 80 percent of the dinosaur’s skeleton and estimate that the animal lived in the area 71 to 74.9 million years ago. It was about two meters (almost seven feet) long, weighed 150 kilograms (330 pounds) and was a herbivore.

According to the scientists, who published their research in the journal Nature, the animal could represent a hitherto unknown lineage of armored dinosaur never seen in the but already identified in the northern part of the continent.

The remains of a Stegouros elengassen, a new species of dinosaur discovered in Patagonia, is seen on display in Santiago Decembe
The remains of a Stegouros elengassen, a new species of dinosaur discovered in Patagonia, is seen on display in Santiago December 1, 20121.

“We don’t know why (the tail) evolved. We do know that within armored dinosaur groups there seems to be a tendency to independently develop different osteoderm-based defense mechanisms,” said Sergio Soto, another member of the team.

The Cerro Guido area, in the Las Chinas valley 3,000 km (1,800 miles) south of Santiago, stretches for 15 kilometers. Various rock outcrops contain numerous fossils.

The finds there allowed the scientists to surmise that present-day America and Antarctica were close to each other millions of years ago.

“There is strong evidence that there is a biogeographic link with other parts of the planet, in this case Antarctica and Australia, because we have two armored there closely related” to the Stegouros, said Soto.


Explore further

New dinosaur species from Chile had a unique slashing tail


More information:
Alexander Vargas, Bizarre tail weaponry in a transitional ankylosaur from subantarctic Chile, Nature (2021). DOI: 10.1038/s41586-021-04147-1. www.nature.com/articles/s41586-021-04147-1

© 2021 AFP

Citation:
Dinosaur tail found in Chile stuns scientists (2021, December 4)
retrieved 4 December 2021
from https://phys.org/news/2021-12-dinosaur-tail-chile-stuns-scientists.html

This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no
part may be reproduced without the written permission. The content is provided for information purposes only.

Adblock test (Why?)



Source link

Continue Reading

Science

Total solar eclipse brings darkness to Antarctic summer – CBC.ca

Published

 on


Video released by NASA shows a total solar eclipse as seen from Western Antarctica on Saturday.

The Earth’s southernmost continent experiences continual daylight from mid-October until early April, but the eclipse brought a few minutes of total darkness.

NASA said the period of totality began at 2:44 a.m. ET. 

A solar eclipse occurs when the moon moves between the sun and Earth, casting a shadow on Earth, fully or partially blocking the sun’s light in some areas.

[embedded content]

For a total eclipse to take place the sun, moon, and Earth must be in a direct line. The only place that this total eclipse could be seen was Antarctica.

The eclipse was also expected to be visible partially from South Africa, Chile, New Zealand and Australia on Saturday.

North America gets its next glimpse of a full solar eclipse on April 8, 2024.

Adblock test (Why?)



Source link

Continue Reading

Trending