Profile cover photo
Profile photo
nemesis maturity
13,510 followers
13,510 followers
About
nemesis maturity's posts

Post has attachment
Cosmic Wonders - Neutron Stars

A neutron star is the collapsed core of a large (10–29 solar masses) star. Neutron stars are the smallest and densest stars known to exist.

Though neutron stars typically have a radius on the order of 10 km, they can have masses of about twice that of the Sun. They result from the supernova explosion of a massive star, combined with gravitational collapse, that compresses the core past the white dwarf star density to that of atomic nuclei.

Most of the basic models for these objects imply that neutron stars are composed almost entirely of neutrons, which are subatomic particles with no net electrical charge and with slightly larger mass than protons.

They are supported against further collapse by neutron degeneracy pressure, a phenomenon described by the Pauli exclusion principle. If the remnant has too great a density, something which occurs in excess of an upper limit of the size of neutron stars at 2–3 solar masses, it will continue collapsing to form a black hole.

Neutron stars that can be observed are very hot and typically have a surface temperature around 600000 K.They are so dense that a normal-sized matchbox containing neutron-star material would have a mass of approximately 3 billion tonnes.

https://en.wikipedia.org/wiki/Neutron_star

Clips, images credit: ESA/HUBBLE, ESO, & NASA

Music credit: YouTube Audio Library

Post has shared content
Winds of Rubies and Sapphires Strike the Sky of Giant Planet
Winds of Rubies and Sapphires Strike the Sky of Giant Planet

Post has shared content
Jaw-Dropping Footage of the Sun! Solar Cycle's Ups and Downs Confirmed In Sat Imagery
Jaw-Dropping Footage of the Sun! Solar Cycle's Ups and Downs Confirmed In Sat Imagery

The sun’s activity rises and falls in a pattern that lasts about 11 years on average. This is called the solar cycle. After seven years in space, SDO has had a chance to do what few other satellites have been able to do – watch the sun for the majority of a solar cycle.

Post has shared content
Massive Object the size of Mars may lurk beyond Neptune - Planet 10?
Massive Object the size of Mars may lurk beyond Neptune - Planet 10?

An unknown, unseen "planetary mass object" may lurk in the outer reaches of our solar system, according to new research on the orbits of minor planets to be published in the Astronomical Journal. This object would be different from—and much closer than—the so-called Planet Nine, a planet whose existence yet awaits confirmation.

In the paper, Kat Volk and Renu Malhotra of the University of Arizona's Lunar and Planetary Laboratory, or LPL, present compelling evidence of a yet-to-be- discovered planetary body with a mass somewhere between that of Mars and Earth. The mysterious mass, the authors show, has given away its presence—for now—only by controlling the orbital planes of a population of space rocks known as Kuiper Belt objects, or KBOs, in the icy outskirts of the solar system.

Phys.Org
https://phys.org/news/2017-06-unseen-planetary-mass-warped-kuiper.html

The University of Arizona
https://uanews.arizona.edu/story/ua-scientists-and-curious-case-warped-kuiper-belt

Clips, images credit: ESO, ESA/HUBBLE, NASA & Heather Roper/LPL



Post has shared content
TOP Scientists WARN that an Asteroid Strike is Just a Matter of Time
TOP Scientists WARN an Asteroid Strike is Just a Matter of Time

A leading astrophysicist from Queen's University Belfast has warned that an asteroid strike is just a matter of time.

Professor Alan Fitzsimmons from the University's Astrophysics Research Centre has said it is a case of when an asteroid collision will happen, rather than if it will happen.

Joined by scientist Brian Cox and astronauts such as Apollo 9 astronaut Rusty Schweickart and astronaut Nicole Stott, Professor Fitzsimmons is highlighting the threat for Asteroid Day, a global event next Friday (30 June).

On that day in 1908, a small asteroid exploded over Tunguska in Siberia and devastated 800 square miles. Professor Fitzsimmons is warning that a similar unexpected strike in today's world could easily destroy a major city and a larger asteroid could be more dangerous.

Professor Fitzsimmons commented: "It is important to know that scientists and engineers have made great strides in detecting Near-Earth Asteroids and understanding the threat posed by them.

Over 1,800 potentially hazardous objects have been discovered so far, but there are many more waiting to be found.

"Astronomers find Near-Earth Asteroids every day and most are harmless. But it is still possible the next Tunguska would take us by surprise, and although we are much better at finding larger asteroids, that does us no good if we are not prepared to do something about them."

Phys.org
Read more here: https://phys.org/news/2017-06-queen-university-scientist-asteroid-danger.html

Provided by: Queen's University Belfast
http://www.qub.ac.uk/

Czech scientists see growing risk of asteroid hitting Earth
https://phys.org/news/2017-06-czech-scientists-asteroid-earth.html

NASA discovers TEN ‘potentially hazardous’ rocks close to Earth
http://www.express.co.uk/news/science/815697/ASTEROID-WARNING-NASA-discovers-potentially-hazardous

Clips, images credit: ESO, ESA/HUBBLE, Alan Fitzsimmons, Queen's University Belfast & NASA/NEOWISE

Post has attachment
Gigantic Eruption of Solar Material on the far Side of the Sun - July 23, 2017

Early on 23 Jul, STEREO-A COR2 imagery observed a pair of fast-moving CMEs off the NE and SE limbs with the second resulting in an asymmetric halo signature.
In addition, both LASCO C2 and C3 imagery observed a full-halo CME. The location of these events place them near dead center on the backside of the disk with no Earth-directed component
expected.

Coronal mass ejections (CMEs) are gigantic bubbles of electrified gas that billow away from the Sun. They can carry as much as 10 billion tons of solar material and trigger spectacular geomagnetic storms if they hit Earth's magnetosphere. CMEs, which usually travel at speeds between 500 and 1500 km/s, take 2 or 3 days to cross the 150 million km divide separating the Sun and Earth.

Clips, images credit: STEREO Ahead COR2, SOHO LASCO C2 & C3
ESA, NASA



Post has attachment
Gigantic Eruption of Solar Material on the far Side of the Sun - July 23, 2017

Early on 23 Jul, STEREO-A COR2 imagery observed a pair of
fast-moving CMEs off the NE and SE limbs with the second resulting in an asymmetric halo signature.
In addition, both LASCO C2 and C3 imagery observed a full-halo CME. The location of these events place them near dead center on the backside of the disk with no Earth-directed component
expected.

Coronal mass ejections (CMEs) are gigantic bubbles of electrified gas that billow away from the Sun. They can carry as much as 10 billion tons of solar material and trigger spectacular geomagnetic storms if they hit Earth's magnetosphere. CMEs, which usually travel at speeds between 500 and 1500 km/s, take 2 or 3 days to cross the 150 million km divide separating the Sun and Earth.

Clips, images credit: STEREO Ahead COR2, SOHO LASCO C2 & C3
ESA, NASA



Post has attachment
Stunning Blue Sunset on Mars

Blue Sunset on Mars As Captured By The Opportunity Rover.

While certainly not as spectacular as those we see on Earth, but it's still pretty amazing.

Images taken by NASA's Opportunity Rover.

Clip credit: NASA/JPL

Post has attachment
Stunning Blue Sunset on Mars

Blue Sunset on Mars As Captured By The Opportunity Rover.

While certainly not as spectacular as those we see on Earth, but it's still pretty amazing.

Images taken by NASA's Opportunity Rover.

Clip credit: NASA/JPL

Post has attachment
A Giant Impact Solving the Mystery of How Mars' Moons Formed 
Wait while more posts are being loaded