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Topic: Gravity

NASA celebrates the 50th Anniversary of the Apollo 11 Moon Landing

 

NASA - National Aeronautics and Space AdministrationHouston, TX – NASA lands “Men Land On The Moon”.

Words such as these were emblazoned in dozens of languages on the front page of newspapers around the world, echoing the first part of President John F. Kennedy’s bold challenge to the nation, made more than eight years earlier – to land a man on the Moon.

That part was successfully accomplished on July 20th, 1969. The second part of the challenge, the safe return to Earth, would have to wait four more days.

Eagle shortly after undocking. (NASA)

Eagle shortly after undocking. (NASA)

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NASA’s Hubble Space Telescope discovers Black Hole in unexpected place

 

NASA - National Aeronautics and Space AdministrationGreenbelt, MD – NASA’s Hubble Space Telescope has found an unexpected thin disk of material furiously whirling around a supermassive black hole at the heart of the magnificent spiral galaxy NGC 3147, located 130 million light-years away.

As if black holes weren’t mysterious enough, astronomers using NASA’s Hubble Space Telescope have found an unexpected thin disk of material furiously whirling around a supermassive black hole at the heart of the magnificent spiral galaxy NGC 3147, located 130 million light-years away.

A Hubble Space Telescope image of the spiral galaxy NGC 3147 appears next to an artist's illustration of the supermassive black hole residing at the galaxy’s core. The Hubble image shows off the galaxy's sweeping spiral arms, full of young blue stars, pinkish nebulas, and dust in silhouette. (Hubble Image: NASA, ESA, S. Bianchi (Università degli Studi Roma Tre University), A. Laor (Technion-Israel Institute of Technology), and M. Chiaberge (ESA, STScI, and JHU); illustration: NASA, ESA, and A. Feild and L. Hustak (STScI))

A Hubble Space Telescope image of the spiral galaxy NGC 3147 appears next to an artist’s illustration of the supermassive black hole residing at the galaxy’s core. The Hubble image shows off the galaxy’s sweeping spiral arms, full of young blue stars, pinkish nebulas, and dust in silhouette. (Hubble Image: NASA, ESA, S. Bianchi (Università degli Studi Roma Tre University), A. Laor (Technion-Israel Institute of Technology), and M. Chiaberge (ESA, STScI, and JHU); illustration: NASA, ESA, and A. Feild and L. Hustak (STScI))

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NASA’s CaveR rover helps scientists explore Underground Life

 

NASA Scientists test out new methods of discovering life in California lava tubes that could one day be used on other worlds.

NASA - National Aeronautics and Space AdministrationSilicon Valley, CA – NASA says imagine descending into a cave carved out by lava to work alongside a rover about the size of Spirit and Opportunity on Mars, watching the pristine wilderness of a national park transition into tall pillars and stalactites, all in a search for subterranean microbes.

That was a typical day for NASA’s Biologic and Resource Analog Investigations in Low Light Environments project, also known as BRAILLE, while on deployment. Operated out of NASA’s Ames Research Center in Silicon Valley, the BRAILLE team is developing the capability to detect life on the walls of volcanic caves from afar.

The CaveR rover preparing to search for life on the walls of a lava tube in Lava Beds National Monument in northeastern California. The rover's instrumentation can be seen in the box on its right side. (NASA)

The CaveR rover preparing to search for life on the walls of a lava tube in Lava Beds National Monument in northeastern California. The rover’s instrumentation can be seen in the box on its right side. (NASA)

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NASA’s Starshade technology to aid observations of far off Planets

 

NASA - National Aeronautics and Space AdministrationPasadena, CA – NASA says the feat of staying highly synchronized while airborne can be appreciated by anyone who’s ever seen aircraft engaged in formation flying. In work sponsored by NASA’s Exoplanet Exploration Program (ExEP), engineers at the Jet Propulsion Laboratory in Pasadena, California, are taking formation flying to a new extreme.

Their work marks an important milestone within a larger program to test the feasibility of a technology called a starshade. Although starshades have never flown in space, they hold the potential to enable groundbreaking observations of planets beyond our solar system, including pictures of planets as small as Earth.

This artist's concept shows the geometry of a space telescope aligned with a starshade, a technology used to block starlight in order to reveal the presence of planets orbiting that star. (NASA/JPL-Caltech)

This artist’s concept shows the geometry of a space telescope aligned with a starshade, a technology used to block starlight in order to reveal the presence of planets orbiting that star. (NASA/JPL-Caltech)

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NASA excited about Apophis Asteroid passing by Earth in 2029

 

NASA - National Aeronautics and Space AdministrationPasadena, CA – NASA says that a speck of light will streak across the sky, getting brighter and faster on April 13th, 2029. At one point it will travel more than the width of the full Moon within a minute and it will get as bright as the stars in the Little Dipper.

But it won’t be a satellite or an airplane – it will be a 1,100-foot-wide (340-meter-wide) near-Earth asteroid called 99942 Apophis that will cruise harmlessly by Earth, about 19,000 miles (31,000 kilometers) above the surface. That’s within the distance that some of our spacecraft that orbit Earth.

The international asteroid research community couldn’t be more excited.

This illustration shows the distance between the Apophis asteroid and Earth at the time of the asteroid's closest approach. The blue dots are the many man-made satellites that orbit our planet, and the pink represents the International Space Station. (NASA/JPL-Caltech)

This illustration shows the distance between the Apophis asteroid and Earth at the time of the asteroid’s closest approach. The blue dots are the many man-made satellites that orbit our planet, and the pink represents the International Space Station. (NASA/JPL-Caltech)

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NASA says network of Telescopes captures historic Black Hole image

 

NASA Headquarters

NASA - National Aeronautics and Space AdministrationWashington, D.C. – A black hole and its shadow have been captured in an image for the first time, a historic feat by an international network of radio telescopes called the Event Horizon Telescope (EHT). EHT is an international collaboration whose support in the U.S. includes the National Science Foundation.

A black hole is an extremely dense object from which no light can escape. Anything that comes within a black hole’s “event horizon,” its point of no return, will be consumed, never to re-emerge, because of the black hole’s unimaginably strong gravity.

Scientists have obtained the first image of a black hole, using Event Horizon Telescope observations of the center of the galaxy M87. The image shows a bright ring formed as light bends in the intense gravity around a black hole that is 6.5 billion times more massive than the Sun. (Event Horizon Telescope Collaboration)

Scientists have obtained the first image of a black hole, using Event Horizon Telescope observations of the center of the galaxy M87. The image shows a bright ring formed as light bends in the intense gravity around a black hole that is 6.5 billion times more massive than the Sun. (Event Horizon Telescope Collaboration)

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NASA’s Spitzer Space Telescope sees galaxies merging into one

 

NASA Jet Propulsion Laboratory

NASA - National Aeronautics and Space AdministrationPasadena, CA – Three images from NASA’s Spitzer Space Telescope show pairs of galaxies on the cusp of cosmic consolidations. Though the galaxies appear separate now, gravity is pulling them together, and soon they will combine to form new, merged galaxies.

Some merged galaxies will experience billions of years of growth. For others, however, the merger will kick off processes that eventually halt star formation, dooming the galaxies to wither prematurely.

This image shows the merger of two galaxies, known as NGC 7752 (larger) and NGC 7753 (smaller), also collectively called Arp86. In these images, different colors correspond to different wavelengths of infrared light. Blue and green are wavelengths both strongly emitted by stars. Red is a wavelength mostly emitted by dust. (NASA/JPL-Caltech)

This image shows the merger of two galaxies, known as NGC 7752 (larger) and NGC 7753 (smaller), also collectively called Arp86. In these images, different colors correspond to different wavelengths of infrared light. Blue and green are wavelengths both strongly emitted by stars. Red is a wavelength mostly emitted by dust. (NASA/JPL-Caltech)

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NASA’s Mars Curiosity Rover measures Gravity along Mount Sharp

 

NASA Jet Propulsion Laboratory

NASA - National Aeronautics and Space AdministrationPasadena, CA – Apollo 17 astronauts drove a moon buggy across the lunar surface in 1972, measuring gravity with a special instrument. There are no astronauts on Mars, but a group of clever researchers realized they have just the tools for similar experiments with the Martian buggy they’re operating.

In a new paper in Science, the researchers detail how they repurposed sensors used to drive the Curiosity rover and turned them into gravimeters, which measure changes in gravitational pull.

Side-by-side images depict NASA's Curiosity rover (illustration at left) and a moon buggy driven during the Apollo 16 mission. (NASA/JPL-Caltech)

Side-by-side images depict NASA’s Curiosity rover (illustration at left) and a moon buggy driven during the Apollo 16 mission. (NASA/JPL-Caltech)

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NASA Telescopes used to study unusual Flash of Light nicknamed “The Cow”

 

Written by Jeanette Kazmierczak
NASA Goddard Space Flight Center

NASA - National Aeronautics and Space AdministrationGreenbelt, MD – A brief and unusual flash spotted in the night sky on June 16th, 2018, puzzled astronomers and astrophysicists across the globe. The event – called AT2018cow and nicknamed “the Cow” after the coincidental final letters in its official name – is unlike any celestial outburst ever seen before, prompting multiple theories about its source.

Over three days, the Cow produced a sudden explosion of light at least 10 times brighter than a typical supernova, and then it faded over the next few months.

AT2018cow erupted in or near a galaxy known as CGCG 137-068, which is located about 200 million light-years away in the constellation Hercules. This zoomed-in image shows the location of the "Cow" in the galaxy. (Sloan Digital Sky Survey)

AT2018cow erupted in or near a galaxy known as CGCG 137-068, which is located about 200 million light-years away in the constellation Hercules. This zoomed-in image shows the location of the “Cow” in the galaxy. (Sloan Digital Sky Survey)

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NASA’s Voyager 2 Probe leaves Heliosphere, enters Interstellar Space

 

NASA Jet Propulsion Laboratory

NASA - National Aeronautics and Space AdministrationPasadena, CA – For the second time in history, a human-made object has reached the space between the stars. NASA’s Voyager 2 probe now has exited the heliosphere – the protective bubble of particles and magnetic fields created by the Sun.

Members of NASA’s Voyager team will discuss the findings at a news conference at 10:00am CST (8:00am PST) on Monday, December 10th at the meeting of the American Geophysical Union (AGU) in Washington. The news conference will stream live on the agency’s website.

This illustration shows the position of NASA's Voyager 1 and Voyager 2 probes, outside of the heliosphere, a protective bubble created by the Sun that extends well past the orbit of Pluto. Voyager 1 exited the heliosphere in August 2012. Voyager 2 exited at a different location in November 2018. (NASA/JPL-Caltech)

This illustration shows the position of NASA’s Voyager 1 and Voyager 2 probes, outside of the heliosphere, a protective bubble created by the Sun that extends well past the orbit of Pluto. Voyager 1 exited the heliosphere in August 2012. Voyager 2 exited at a different location in November 2018. (NASA/JPL-Caltech)

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