#jplcaltech

[sciencehook]

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Our Milky Way Galaxy: How Big is Space? By Pat Brennan, NASA's Exoplanet Exploration Program Video credit: NASA/JPL-Caltech What is a light year? "It’s one of the most commonly used celestial yardsticks, the distance light travels in one year. Light zips along through interstellar space at 186,000 miles (300,000 kilometers) per second (more than 66 trips across the entire United States, in one second). Multiply that by all the seconds in one year, and you get 5.8 trillion miles (9.5 trillion kilometers). Just for reference, Earth is about eight light minutes from the Sun. A trip at light speed to the very edge of our solar system – the farthest reaches of the Oort Cloud, a collection of dormant comets way, way out there – would take about 1.87 years. Keep going to Proxima Centauri, our nearest neighboring star, and plan on arriving in 4.25 years at light speed. If you could travel at light speed. Which, unless you’re a photon (a particle of light), you can’t, and, by current physics, might never be possible." [Pat Brennan] Source: https://exoplanets.nasa.gov/blog/1563/our-milky-way-galaxy-how-big-is-space/ #space #universe #MilkyWay #NASA #JPLCaltech #interstellar #star #sun #earth #proximacentauri #exoplanets #oortcloud #photon #LightTime #LightYear #Physics #AstroPhysics #PatBrennan #scaleoftheuniverse #scale #comparison light #distance #astrophysics #science #allaroundscience #sciencehook https://www.instagram.com/p/B3Y53uZjLee/?igshid=4v0bepqzcppl

[scienceacumen]

Magnetars are not just insanely powerful -- They're also very, very dangerous. If you were a mere 1,000 kilometers from a magnetar, your entire body would dissolve as the magnetic field rearranged the sequence of atoms in your body.

📷: X-ray: NASA/CXC/Univ. of West Virginia/H. Blumer; Infrared (Spitzer and Wise): NASA/JPLCalTech/Spitzer

[spaceexp]

Mission to Mars

Cyprus Spacewalk Space Festival 2020 poster / Orbiter.ch Aerospace logo. April 4, 2020 Anticipation article dedicated to the Cyprus Spacewalk Space Festival 2020, which unfortunately will not take place this year because of the coronavirus pandemic.

Earth moving away

2035, ten years after the return of man to the Moon, here we are from Earth's orbit in the direction of Mars. A trip of longer in automatic mode's of one year trip with the return.

 Mars

Six months later, here we are at the Matian Gateway, ready to dock with the Mars orbital station. Our Antares spacecraft releases the Martian Ares lander. This will dock with the Matian Gateway. Then it's our turn.

Mission to Mars

Once these maneuvers have been carried out, we disembark and take our places in the orbital station. The crew is divided into two groups: the one who will remain in the station and those who will land on Mars, the roles have already been predefined since the start of the mission. The crew that remains on board the station is made up of a biologist / chemist and a specialist in planets and meteorologist as well as the pilot and engineer of Antares.

 Mars topography and locations

In the group that lands on Mars, there are two scientists and a mission specialist (pilot, engineer). The Ares lander is ready for departure from the orbital station, it unlocks, makes a remote maneuver and starts its main engine to start its descent on Mars.

Mars geology and locations

The Astronauts will live "seven minutes of terror" during the atmospheric entry phase, that of Mars is much less dense than that of Earth and is only 30 km thick. Lander landed on Mars, everything went well, the lander landed in the right place, at Solis Planum near East of Valles Marineris. It is a small step for a man, but a big step for humanity.

Mars, the Paradise of Geologists and Mineralogists!

Mars, the Paradise of Geologists and Mineralogists! How many rock formations to explore, analyze, work awaits us! Astronauts install the first Martian Base. They deploy the transmission instrument and devices. Set up the solar panels, tank and deploy the Rover.

Mission to Mars 2

Geologist and mineralogist take the Rover to take an exploration trip to the edge of the Valles Marineris canyon. The view is breathtaking! They take the opportunity to collect soil and rock samples. Once the samples are loaded in the Rover, return to the "home" (Mars Base).

At the edge of Valles Marineris canyon

A month has passed and it is time to return to the Martian orbital station. Lift off smoothly and here we are in orbit. Approach to Gateway, docking at the station and unloading of Martian samples and transfer to the Antares spacecraft. Dismantling of the station and departure for the return to Earth. End of mission. Editor & writer note: Hoping that this article will have made you travel a bit in these difficult times of confinement, a big thank you to the whole festival team and to the readers and see you next year for the 2021 edition. Best regards, take care, Roland Berga. Related links: KITION PLANETARIUM & OBSERVATORY (CYPRUS): http://www.astronomycyprus.eu/ KITION PLANETARIUM & OBSERVATORY (CYPRUS) on Facebook: https://www.facebook.com/groups/kition/ Orbiter.ch Aerospace on Facebook: https://www.facebook.com/Orbiter.ch/ Orbiter.ch Aerospace - YouTube: https://www.youtube.com/user/Orbinaute Orbiter.ch Space News: https://orbiterchspacenews.blogspot.com/ Orbiter.ch Space News, Daily: https://paper.li/Orbiter_ch/1306415282#/ Orbiter.ch Aerospace - Add-on's for Orbiter Space Flight Simulator: https://orbiter.jimdo.com/ Orbiter.ch Aerospace - Add-on's for Flight Simulator X (FSX) and IL-2 Sturmovik 1946: https://simulators.jimdo.com/ Images, Animations, Videos, Text, Credits: NASA/JPLCaltech/ESA/HubbleWikimedia/Orbiter.ch Aerospace/ Orbiter.ch Aerospace Studio/Roland Berga. Best regards, Orbiter.ch Full article

[ninermike9m]

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Subhanallah ♥️ . . Repost : Our Milky Way Galaxy: How Big is Space? . By Pat Brennan, NASA's Exoplanet Exploration Program . Video credit: NASA/JPL-Caltech What is a light year? "It’s one of the most commonly used celestial yardsticks, the distance light travels in one year. Light zips along through interstellar space at 186,000 miles (300,000 kilometers) per second (more than 66 trips across the entire United States, in one second). . Multiply that by all the seconds in one year, and you get 5.8 trillion miles (9.5 trillion kilometers). Just for reference, Earth is about eight light minutes from the Sun. A trip at light speed to the very edge of our solar system – the farthest reaches of the Oort Cloud, a collection of dormant comets way, way out there – would take about 1.87 years. . Keep going to Proxima Centauri, our nearest neighboring star, and plan on arriving in 4.25 years at light speed. . If you could travel at light speed. Which, unless you’re a photon (a particle of light), you can’t, and, by current physics, might never be possible." [Pat Brennan] . . For IG followers please click on our bio - Source: https://exoplanets.nasa.gov/blog/1563/our-milky-way-galaxy-how-big-is-space/ . . #space #universe #MilkyWay #NASA #JPLCaltech #interstellar #star #sun #earth #proximacentauri #exoplanets #oortcloud #photon #LightTime #LightYear #Physics #AstroPhysics #PatBrennan #scaleoftheuniverse #scale #comparison light #distance #astrophysics #science #allaroundscience https://www.instagram.com/p/B3XIFniFMF8/?igshid=grk8tjmq4359

[yetiyeth]

i tried saturn too... saturn is so beautiful! ❤❤❤ #NASA #JPL #JPLCaltech #SSI #Saturn #Astronomy

[starwalkapp]

Astronomers discover third planet in the Kepler-47 circumbinary system⠀ ⠀ Astronomers have discovered a third planet in the Kepler-47 system, securing the system's title as the most interesting of the binary-star worlds. Using data from NASA's Kepler space telescope, a team of researchers, led by astronomers at San Diego State University, detected the new Neptune-to-Saturn-size planet orbiting between two previously known planets.⠀ ⠀ With its three planets orbiting two suns, Kepler-47 is the only known multi-planet circumbinary system. Circumbinary planets are those that orbit two stars.⠀ ⠀ The planets in the Kepler-47 system were detected via the "transit method." If the orbital plane of the planet is aligned edge-on as seen from Earth, the planet can pass in front of the host stars, leading to a measurable decrease in the observed brightness. The new planet, dubbed Kepler-47d, was not detected earlier due to weak transit signals.⠀ ⠀ As is common with circumbinary planets, the alignment of the orbital planes of the planets change with time. In this case, the middle planet's orbit has become more aligned, leading to a stronger transit signal. The transit depth went from undetectable at the beginning of the Kepler Mission to the deepest of the three planets over the span of just four years.⠀ ⠀ The SDSU researchers were surprised by both the size and location of the new planet. Kepler-47d is the largest of the three planets in the Kepler-47 system.⠀ ⠀ William Welsh, SDSU astronomer and the study's co-author, said he and Orosz expected any additional planets in the Kepler-47 system to be orbiting exterior to the previously known planets. "We certainly didn't expect it to be the largest planet in the system. This was almost shocking," said Welsh. Their research was recently published in the Astronomical Journal.⠀ ⠀ With the discovery of the new planet, a much better understanding of the system is possible. For example, researchers now know the planets in this circumbinary system are very low density -- less than that of Saturn, the Solar System planet with the lowest density.⠀ ⠀ Image Credit: NASA/JPLCaltech/T. Pyle⠀ Text Credit: San Diego State University via Instagram https://www.instagram.com/p/BwWIm4JnaHl/

[the-tech-news]

The Earth and the Moon captured from Saturn by NASAs Cassini spacecraft on July 19 2013 over 900 million miles away Credit NASA JPLCaltech CICLOPS Jason Major. . more on https://www.reddit.com/r/space/comments/qjh3qy/the_earth_and_the_moon_captured_from_saturn_by/

[haute-lifestyle-com]

NOVA Goes Inside The NASA MARS Mission  - Looking For Life on Mars - Premieres February 24 - #janetwalker  #hautelifestylecom #theentertainmeentzonecom #nasa #marsmission  #perseverance #jplcaltech #pbs #nova

[ca-se-passe-la-haut]

La croissance perturbée de Jupiter

Lors de sa formation, comment se fait-il que Jupiter ait pris 2 millions d'années pour grossir de 20 à 50 fois la masse de la Terre alors qu'il ne lui avait fallu auparavant qu'un seul million d'années pour atteindre 20 masses terrestres ? Une équipe d'astronomes suisses vient de trouver une explication.

Yann Alibert (Université de Berne) et ses collègues de Zürich  ont tenté de comprendre l'histoire de la formation de Jupiter, qui l'a amené à la planète géante gazeuse que nous connaissons aujourd'hui avec sa masse 300 fois plus grande que celle de la Terre. Ils se sont pour cela penchés sur des données de composition d’astéroïdes obtenues il y a quelques années. Elles montraient qu'il devait exister deux populations distinctes de petits corps durant les deux premiers millions d'années du système solaire. Il était donc fort probable que Jupiter agissait à l'époque comme une sorte de barrière séparant la zone externe et la zone interne du système solaire, au moment où Jupiter passait de 20 à 50 masses terrestres.

Les astronomes suisses ont construit un modèle de formation de Jupiter qui est cohérent avec les données des astéroïdes. Dans leur article que publie Nature Astronomy cette semaine, Yann Alibert et ses collaborateurs montrent comment Jupiter a du grossir en plusieurs étapes. D'après ce modèle, Jupiter est née tout d'abord en accrétant de la poussière et des petits "cailloux" d'une taille centimétrique en grande quantité, durant 1 million d'années. Cette phase de grossissement rapide lui a permis d'atteindre une masse déjà très importante de 20 masses terrestres. Mais cette phase s'est arrêtée pour être suivie par une deuxième phase avec un taux d'accrétion plus faible, et surtout des morceaux beaucoup plus gros, cette fois-ci des petits corps d'une taille de l'ordre du kilomètre, des planétésimaux. D'après les chercheurs, le fait qu'il s'agisse dans cette phase de corps de grande taille a certes apporté à nouveau de la masse à l'embryon de planète géante, mais il a surtout apporté de l'énergie. Cette deuxième phase aurait duré deux millions d'années, pour laisser ensuite la place à la troisième phase de grossissement, à T0+3 millions d'années, cette fois-ci par une forte accrétion de gaz qui a conduit Jupiter jusqu'aux 300 masses terrestres que nous lui connaissons aujourd'hui. 

Ce qu'expliquent les chercheurs, c'est que la Jupiter naissante aurait fortement perturbé le disque de poussières entourant le Soleil, en créant une zone de surdensité qui aurait confiné les petits cailloux à l'extérieur de son orbite. Les matériaux des régions extérieures n'auraient alors pas pu se mélanger avec ceux des régions internes du système solaire, jusqu'à ce que la protoplanète atteigne une masse suffisante pour perturber et diffuser des corps de taille moyenne de l'extérieur vers l'intérieur du système solaire. 

D'après Yann Alibert et son équipe leur nouvelle modélisation indique que c'est l'apport d'énergie par les planétésimaux qui aurait retardé le grossissement de Jupiter. En effet, les collisions avec des blocs de l'ordre du kilomètre aurait apporté suffisamment d'énergie à l'atmosphère gazeuse de la planète sous forme de chaleur pour l'empêcher de se refroidir rapidement et de se contracter, et d'enclencher une forte accrétion de gaz. Cette dernière a ensuite pu se déployer lorsque le réservoir de planétésimaux s'est tari. 

Les astronomes pensent avoir trouvé une explication pertinente pour expliquer l'histoire de la formation de Jupiter, et poussent même leur raisonnement vers le processus de formation d'autres planètes gazeuses comme Uranus et Neptune qui pourrait être assez similaire. Mais d'autres études seront nécessaires pour en savoir plus.

Source

The formation of Jupiter by hybrid pebble–planetesimal accretion

Yann Alibert, Julia Venturini, Ravit Helled, Sareh Ataiee, Remo Burn, Luc Senecal, Willy Benz, Lucio Mayer, Christoph Mordasini, Sascha P. Quanz & Maria Schönbächler 

Nature Astronomy (27 august 2018)

https://doi.org/10.1038/s41550-018-0557-2

Illustrations 

1) L'hémisphère sud de Jupiter imagé par la sonde Juno (NASA/JPLCaltech/SwRI/MSSS/GeraldEichstaedt/Sean Doran)

2) Schéma des trois phases de grossissement de Jupiter (Alibert et al, Nature Astronomy)

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[quantumd3]

Odysseus, the huge crater on Saturn's moon Tethys, is 445km across: over 2/5 of the moon's diameter! Image Credit: (NASA/JPLCaltech/SpaceScienceInstitute) http://ift.tt/2j59BI9

[astro-analytics]

Система Kepler 62. Иллюстрация NASA Ames JPL-Caltech

http://astro-analytics.net

Система Kepler 62. Иллюстрация NASA Ames JPL-Caltech

[astro-analytics]

Система Kepler 62. Иллюстрация NASA Ames JPL-Caltech

http://astro-analytics.net

Система Kepler 62. Иллюстрация NASA Ames JPL-Caltech

[astro-analytics]

Система Kepler 69. Иллюстрация NASA Ames JPL-Caltech

http://astro-analytics.net

Система Kepler 69. Иллюстрация NASA Ames JPL-Caltech

[astro-analytics]

Система Kepler 62. Иллюстрация NASA Ames JPL-Caltech

http://astro-analytics.net

Система Kepler 62. Иллюстрация NASA Ames JPL-Caltech

[astro-analytics]

Система Kepler 62. Иллюстрация NASA Ames JPL-Caltech

http://astro-analytics.net

Система Kepler 62. Иллюстрация NASA Ames JPL-Caltech