According to a new study, the Moon might has been formed a thousand years earlier than Earth. The new, “synestia theory” suggests a Mars-sized object smashed into the proto-Earth. The “giant impact” vaporized about 10 percent of the rock and liquefied the rest, and created a rapidly spinning donut-shaped mass of vaporized rock called “synestia”. The synestia eventually shrunk and cooled. Computer models demonstrated that the Earth subsequently emerged about 1,000 years after the moon.
Continue reading Moon has been formed earlier than Earth? The “synestia theory” says so
On March 24, 2017, astronomers led by Carnegie’s Meredith MacGregor and Alycia Weinberger discovered that a giant stellar flare erupted from Proxima Centauri, the closest star to the Sun (Proxima Centauri means ‘nearest [star] of Centaurus’), using data from the Atacama Large Millimeter/submillimeter Array (ALMA). The huge flare was 10 times larger than a major solar flare. And it blast Proxima Centauri b (also called Proxima b), the exoplanet orbiting within the habitable zone of Proxima Centauri, with 4,000 times more radiation than Earth gets from solar flares. The event probably wiped out the expolanet’s atmosphere (if exists any), and dimmed the last hopes of extraterrestrial life on it. This finding is published by The Astrophysical Journal Letters on February 22, 2018.
Continue reading Huge Proxima Centauri flare blasts nearest exoplanet Proxima b
On September 20, 2016, Argentinian amateur astronomer Victor Buso was testing his camera-telescope setup. He pointed his Newtonian telescope at NGC613, a barred spiral galaxy located some 67 million light years away in the southern constellation of Sculptor. Then he started taking a series of short-exposure photographs. To ensure his new camera was functioning properly, he examined the images right away. While doing that, he noticed something very interesting: a previously invisible point of light near the end of a spiral arm of the galaxy: a newborn supernova – an elusive event that nobody had ever captured before.
Continue reading Amateur Astronomer Recorded a Newborn Supernova Accidentally
NASA’s asteroid-sampling OSIRIS-REx spacecraft captured a new Earth-Moon image on Jan. 17, 2018, from a distance of 39.5 million miles (63.6 million kilometers). Spacecraft used its NavCam1 imager to take this photo, as part of an engineering test. In the image, The Earth and the moon are just two bright dots against the vastness of black space – which reminds us Carl Sagan’s famous speech: “That’s here. That’s home. That’s us.”
Continue reading OSIRIS-REx Captures New Earth-Moon Image from 39.5 Million Miles
It took 27 years, but finally, NASA’s New Horizons spacecraft beat Voyager 1’s record for being farthest from Earth while capturing images. Taken on December 5, 2017, New Horizons image of the open star cluster NGC 3532 (also commonly known as the Football Cluster or the Wishing Well Cluster) became the farthest image ever made by any spacecraft, breaking a 27-year record set by Voyager 1. But for a very short time! About 2 hours later, New Horizons broke its own record with images of two Kuiper Belt objects.
Continue reading New Horizons beats Voyager 1’s Record for being farthest from Earth while capturing images
Good news for the search for extraterrestrial life: the TRAPPIST-1 System might be rich (very rich!) in water, and all of the planets are mostly made of rock. Using data from NASA’s Spitzer and Kepler space telescopes, researchers calculated the densities of TRAPPIST-1 planets more precisely than ever, and they determined that all of the planets are mostly made of rock. Additionally, some have up to 5 percent of their mass in water, which is around 250 times more than the oceans on Earth. Researchers published their findings in a recent study in the journal Astronomy and Astrophysics titled “The nature of the TRAPPIST-1 exoplanets” .
Continue reading Hubble Observes Atmospheres of TRAPPIST-1 Exoplanets in the Habitable Zone
Today (January 31), with popular terms, there was a “super blue blood moon”. It will be the first full total moon eclipse since September 27/28, 2015. What’s more, it was the first Blue Moon / Blood Moon visible from the United States since 1866.
Continue reading Super Blue Blood Moon 2018
On 15 February 2013, an approximately 20-meter (66 feet) meteoroidNotes 1 entered Earth’s atmosphere over Russia, with a speed of 19.16 ± 0.15 kilometers per second (60,000–69,000 km/h or 40,000–42,900 mph). Its mass is estimated at 7,000 to 10,000 tons, one of the largest meteoroids entered Earth’s atmosphere in the recent history. Then, at 9:20 am local time (03:20 UTC), it exploded some 20 to 30 kilometers above the city of Chelyabinsk and created a gigantic fireball (known as a superbolideNotes 1) brighter than the Sun. An estimated 500 kilotons of energy was released by the explosion. For a comparison, the “Little Boy”, the atomic bomb dropped on the Japanese city of Hiroshima on 6 August 1945 exploded with an energy of approximately 15 kilotons of TNT. So, the Chelyabinsk meteor’s explosion was about 33 times stronger. The shock waves damaged several thousand buildings and injured approximately 1,500 people. No deaths were reported.
Continue reading Why meteoroids explode before they reach Earth?
Twelve years ago, on January 19, 2006, aboard an Atlas V rocket, NASA’s New Horizons probe started its fantastic voyage of exploration with a spectacular launch from the Florida coast toward Pluto and the mysterious realm of the Kuiper Belt beyond.
Continue reading Watch: 12 Years Ago, New Horizons’ fantastic voyage began with a spectacular launch
In 1054 A.D, a new, very bright star has appeared in Earth’s sky, in the constellation Taurus. Chinese, Japanese, Korean, and Arab astronomers observed the event and noted “a new bright star emerged in the heavens”. The star was so bright: for nearly three weeks, it was visible even during the day time, under the hot, shiny summer sun, and remained visible for around two years (653 days to be exact). Today, we know that that “heavenly star” was actually a supernova (SN 1054), and its remnant is what we now know as the Crab Nebula today (catalogue designations M1, NGC 1952, Taurus A).
Continue reading A new star in heavens: how Crab Nebula was born