Glaretum fundado en el 2015 con el objetivo de divulgar la ciencia a través de la Astronomía hasta convertirnos en una fuente de conocimiento científico veraz siendo garantía de información seria y actualizada.
248 posts
Latest Posts by glaretum - Page 2
Spotted: signs of a planet about 28 million light-years away 🔎 🪐
For the first time, astronomers may have detected an exoplanet candidate outside of the Milky Way galaxy. Exoplanets are defined as planets outside of our Solar System. All other known exoplanets and exoplanet candidates have been found in the Milky Way, almost all of them less than about 3,000 light-years from Earth.
This new result is based on transits, events in which the passage of a planet in front of a star blocks some of the star's light and produces a characteristic dip. Researchers used our Chandra X-ray Observatory to search for dips in the brightness of X-rays received from X-ray bright binaries in the spiral galaxy Messier 51, also called the Whirlpool Galaxy (pictured here). These luminous systems typically contain a neutron star or black hole pulling in gas from a closely orbiting companion star. They estimate the exoplanet candidate would be roughly the size of Saturn, and orbit the neutron star or black hole at about twice the distance of Saturn from the Sun.
This composite image of the Whirlpool Galaxy was made with X-ray data from Chandra and optical light from our Hubble Space Telescope.
Credit: X-ray: NASA/CXC/SAO/R. DiStefano, et al.; Optical: NASA/ESA/STScI/Grendler
Make sure to follow us on Tumblr for your regular dose of space!
Vía Láctea desde Stintino, la cual es una localidad italiana de la provincia de Sassari en la región de Cerdeña.
El autor nos comenta que en uno de sus viajes visitando a un amigo, encontró esta granja de molinos de viento en la posición perfecta para hacer un arco de la Vía Láctea en ella.
La composición fue complicada porque por un lado quería hacer visibles los molinos de viento,
pero por otro lado para mostrarlos todos había que alejarse un poco de ellos. Por esta razón decidí usar la carretera principal como línea principal y poner a su amigo en el medio, usándolo como primer plano.
Nikon D850 - Nikkor 20mm f1.8 - Haida Clear Night
Crédito: Pellegrini Stefano Photography
https://instagram.com/pels_photo
~Antares
A veces solo es necesario alejarse de la ciudad, tomar aire fresco y apreciar las estrellas.
Crédito: Tero Marin
https://instagram.com/teromarin
~Antares
How the Sun Affects Asteroids in Our Neighborhood
It’s no secret the Sun affects us here on Earth in countless ways, from causing sunburns to helping our houseplants thrive. The Sun affects other objects in space, too, like asteroids! It can keep them in place. It can move them. And it can even shape them.
Asteroids embody the story of our solar system’s beginning. Jupiter’s Trojan asteroids, which orbit the Sun on the same path as the gas giant, are no exception. The Trojans are thought to be left over from the objects that eventually formed our planets, and studying them might offer clues about how the solar system came to be.
Over the next 12 years, NASA’s Lucy mission will visit eight asteroids—including seven Trojans— to help answer big questions about planet formation and the origins of our solar system. It will take the spacecraft about 3.5 years to reach its first destination.
How does the Sun affect what Lucy might find?
Place in Space
Credits: Astronomical Institute of CAS/Petr Scheirich
The Sun makes up 99.8% of the solar system’s mass and exerts a strong gravitational force as a result. In the case of the Trojan asteroids that Lucy will visit, their very location in space is dictated in part by the Sun’s gravity. They are clustered at two Lagrange points. These are locations where the gravitational forces of two massive objects—in this case the Sun and Jupiter—are balanced in such a way that smaller objects (like asteroids or satellites) stay put relative to the larger bodies. The Trojans lead and follow Jupiter in its orbit by 60° at Lagrange points L4 and L5.
Pushing Asteroids Around (with Light!)
The Sun can move and spin asteroids with light! Like many objects in space, asteroids rotate. At any given moment, the Sun-facing side of an asteroid absorbs sunlight while the dark side sheds energy as heat. When the heat escapes, it creates an infinitesimal amount of thrust, pushing the asteroid ever so slightly and altering its rotational rate. The Trojans are farther from the Sun than other asteroids we’ve studied before, and it remains to be seen how sunlight affects their movement.
Cracking the Surface (Also with Light!)
The Sun can break asteroids, too. Rocks expand as they warm and contract when they cool. This repeated fluctuation can cause them to crack. The phenomenon is more intense for objects without atmospheres, such as asteroids, where temperatures vary wildly. Therefore, even though the Trojans are farther from the Sun than rocks on Earth, they’ll likely show more signs of thermal fracturing.
Solar Wind-Swept
Like everything in our solar system, asteroids are battered by the solar wind, a steady stream of particles, magnetic fields, and radiation that flows from the Sun. For the most part, Earth’s magnetic field protects us from this bombardment. Without magnetic fields or atmospheres of their own, asteroids receive the brunt of the solar wind. When incoming particles strike an asteroid, they can kick some material off into space, changing the fundamental chemistry of what’s left behind.
Follow along with Lucy’s journey with NASA Solar System on Instagram, Facebook, and Twitter, and be sure to tune in for the launch at 5 a.m. EDT (09:00 UTC) on Saturday, Oct. 16 at nasa.gov/live.
Make sure to follow us on Tumblr for your regular dose of space!
The Exploration Behind the Inspiration at NASA
Are we alone? How did we get here? Where are we headed?
At NASA, our mission is to explore. We visit destinations in our solar system and study worlds beyond to better understand these big questions.
We also dream. We dream of traveling to distant worlds, and what that might be like. In the video above you can see fanciful, imagined adventures to real places we’ve studied at NASA.
How We Did It
Check out how we created these otherworldly scenes in the video below. A NASA videographer used green screens to add motion and real people to bring life to our series of solar system and exoplanet travel posters.
Let’s dive into one example from the video. The shot of kayaking on Titan showcases the real rivers and lakes of liquid methane and ethane that slosh and flow on Saturn's largest moon. Titan's mysterious surface was revealed by our Cassini spacecraft, which also deployed the European Space Agency’s Huygens probe to the surface. The atmosphere on Titan is so thick, and the gravity so light, that with each strike of a paddle, you might be lofted above the swift current as you ride the tides through a narrow strait called the Throat of Kraken. NASA scientist Mike Malaska studies Titan and collaborated on the poster featured in the video. His research informed the artwork, and so did a hobby: kayaking. Those ultra-cold chemical seas might be even more of a challenge than shown here. Your boat might crack, or even dissolve, Malaska said.
We’ll learn more about Titan when our Dragonfly mission of dual quadcoptors — rotorcraft with eight blades each — visits the icy moon in 2034.
Science Never Stops
Our understanding of other worlds is always evolving, and sometimes we learn new details after we illustrate our science. In one of our travel posters, we show a traveler standing on the surface of exoplanet Kepler-16b with two shadows formed by the planet’s two suns. The planet does indeed orbit two stars, but with later size and mass refinements, we now think it would be hard to stand there and enjoy a binary sunset. There isn't a solid surface to stand on a gas planet, and that's what Kepler-16b now appears to be!
In addition to sharing how sublime science can be, these scenes are a reminder that there are lots of careers in the space program, not just scientist, engineer, or astronaut. A creative team at NASA’s Jet Propulsion Laboratory in Southern California produced the travel posters, originally to help share the work of NASA's Exoplanet Exploration Program. They are the result of lots of brainstorming and discussion with real NASA scientists, engineers, and expert communicators. The video versions of these spacey travel scenes were produced by visualization experts at NASA’s Goddard Space Flight Center in Greenbelt, Maryland.
All of this work is meant to inspire, and to explore the edge of possibility. It’s also an invitation. With science, we’re stepping into the future. Join us?
Vía Láctea en Colorado. El autor menciona que la nieve y el frio le permitieron una gran exposición de astrofotos. La imagen mostrada fue tomada a 15 °F e ISO 3200. El sensor de imagen fría lleva a imágenes de bajo ruido.
Crédito: Connor Joslin
https://instagram.com/cojoslin
~Antares
Vía Láctea sobre Payson, Arizona. Una ciudad al norte del condado de Gila.
Crédito: Evan Amos
https://instagram.com/evanamos
~Antares
Aurora boreal sobre Rovaniemi, capital de Laponia en el norte de Finlandia.
Crédito: Ryan Oliveira
https://instagram.com/roliveira33
~Antares
Fotografía de la luna el sábado 9 de Octubre 2021 en su fase creciente al 14,5% de luminosidad, una sola exposición. Sierra de Bolón, Elda.
Crédito: Jordi Coy Astrophoto
https://instagram.com/jordicoy_astrophoto
~Antares
Vía Láctea desde San Pedro Mártir, Baja California Norte México 🇲🇽
Crédito: Silvia Del Rincón
Rastro estelar sobre los árboles muertos en el embalse de Manasquan, Jersey Shore, NJ. Para esta fotografía fueron tomadas más de 280 fotos en el transcurso de 1.5 horas y apiladas para mostrar el aparente movimiento de las estrellas.
Crédito: John Entwistle.
https://instagram.com/johnentwistle_photography
~Antares
La galaxia del molinete ubicada en la constelación de la osa mayor ubicada a 25 millones de años luz. Para más información de la fotografía, visiten el perfil del autor.
Crédito: Daniel Velázquez.
https://instagram.com/dnvlgm
~Antares
Encontrar ruinas y obtener fotografías junto a las estrellas es algo fantástico. Villacreces, Castilla y León, España. Villacreces fue el primer despoblado del siglo XX en Tierra de Campos.
La estructura que podemos ver en el centro es la Torre mudéjar.
Crédito: Marcos Alonso
https://instagram.com/elpiratilla
~Antares
Vía Láctea sobre Estación Wadley, San Luis Potosí. En la imagen podemos ver una casa de adobe.
Crédito: Pavel Vorobiev
https://instagram.com/_vorobservatorio_
~Antares
Fotografía de una sola exposición a la salida de la luna en Willow Spring Lake, ubicado en la cima del Mogollon Rim en el norte de Arizona, a unos 37 km al este de la ciudad de Payson en los Bosques Nacionales Apache-Sitgreaves, inmediatamente adyacente a la SR 260.
Crédito: Evan Amos
https://instagram.com/evanamos
~Antares
Normalmente ponemos imágenes de la Vía Láctea, estrellas, meteoros y la Luna... pero luego nos preguntamos, ¿Y por que fotos del Sol no? Y que mejor que compartir una de nuestra estrella en uno de los fenómenos que normalizamos pero que no deja de ser maravilloso, una puesta de sol.
Crédito: Juanma Espinosa
https://instagram.com/juanmaespinosa
~Antares
La galaxia de andromeda o también conocida como M31, una galaxia que en unos millones de años colisionaran con nuestra galaxia y ambas se fusionaran formando una nueva.
Te invitamos a que sigas el perfil del autor de esta fotografías para que veas con que equipo la tomo y que hizo para revelarla.
Crédito: Alan Dyer
https://instagram.com/amazingskyguy
https://www.amazingsky.com/
~Antares
Arco de la Vía Láctea sobre el Parque Nacional del Teide, el cual es el mayor de Canarias. Es una excursión obligada para todos los que visiten Tenerife.
Un paisaje único de cráteres, volcanes y ríos de lava petrificada que rodean la impresionante silueta del Volcán Teide, que se alza hasta los 3.718 m de altitud.
Crédito: Benjamin Barakat
https://instagram.com/benjaminbarakat
~Antares
Vía Láctea sobre campos de lavanda, Bulgaria.
Crédito: Mihail Minkov
https://instagram.com/fineartshot
~Antares
Más fotografías que se pudieron captar en nuestra aventura por el Desierto Wirikuta.
Crédito: Pavel Vorobiev
https://instagram.com/_vorobservatorio_
~Antares
La luna, Venus y la estrella Spica de la constelación de la virgen, un hermoso triangulo celestial.
Crédito: Filippo Galati Fotografía
https://instagram.com/filippo.galati
~Antares
Auroras boreales en Finlandia. ¿Te gustaría saber más información de este tipo de fenómenos? En este video te lo explicamos:
https://youtu.be/ucbLpiGVWiU
Crédito: Ryan Oliveira
https://instagram.com/roliveira33
~Antares
Vía Láctea capturada a través de un lente ojo de pescado o fisheye.
Un objetivo ojo de pez es una lente de ángulo ultra ancho que produce una distorcion visual fuerte con la intención de crear una imagen panorámica o hemisférica ancha.
Crédito: Dr. Sebastian Voltmer
https://instagram.com/sebastianvoltmer
~Antares
Vía Láctea en el desierto de Mohave.
Crédito: Julio C. Lozoya
https://instagram.com/julio_c_lozoya
https://www.facebook.com/jclozoya
~Antares
Vía Láctea en Isla Mujeres.
Esta isla se encuentra en el mar Caribe a 13 kilómetros de la ciudad de Cancún, el cual es el principal centro turística de la región.
Crédito: Robert Fedez
https://instagram.com/robert_fedez
~Antares
Vía Láctea desde Beenkeragh ridge, un estrecho rocoso entre los dos picos más altos de Irlanda.
Crédito: Keith
https://instagram.com/mc_snap_agram
~Antares
¿Han identificado constelaciones antes?
El autor nos comenta que para esta foto tuvo que esperar que la lluvia de meteoros de las Perseidas se terminara. En ella se pueden identificar algunas de las constelaciones que logramos ver a primeras horas de la noche durante el invierno. El grupo de estrellas que más podemos visualizar es el grupo de las Pléyades en la esquina superior derecha.
Nikon D850 - Tamron 15/30 mm
Crédito: Pellegrini Stefano Photography
https://instagram.com/pels_photo
~Antares
Perseidas
📅 11 de Agosto del 2021
Composición de fotos
3 horas - 540 tomas de 20 segundos. En autor nos comparte que solo pudo capturar 20 meteoros.
Crédito: PINVE72
https://instagram.com/pinve72
~Antares
