Home » Noticias » Diamond ring (versión en ingles)
Diamond ring
(versión en ingles)

[ESA Space Science image of the Day, original text from link]

Love is in the air this week! Whether you’re a red rose enthusiast or are planning to eschew all involvement this year, we have a cosmic Valentine’s treat to please even the most romance-averse: this bright and beautiful celestial ring.

Glimmering with colour and light against a pitch-black sky, this ring was seen during the eclipse that took place on 21 August 2017 across the USA. This event was a total solar eclipse, meaning that the Moon slipped perfectly in front of the Sun and blocked the entirety of the star’s light – an occurrence known as totality – for a band of observers across the country.

The shadow of the eclipse took 1.5 hours to cross the USA, moving from Oregon to South Carolina, and gave eager eclipse-watchers within the totality belt up to 160 seconds of total darkness.

This snapshot was captured during an eclipse expedition to the USA as part of ESA’s CESAR (Cooperation through Education in Science and Astronomy Research) educational initiative. CESAR engages students in the wonders of science and technology – astronomy in particular. The expedition team organised a special event on eclipse day, and delivered a broadcast including eclipse footage and talks with experts.

Totality for the team occurred at precisely 10:42 local time in Casper, Wyoming (17:42 GMT); this image was taken moments after totality ended and the Moon continued along its path through the sky.

The eclipse’s likeness to a diamond ring is a well-documented effect within astronomy, and seen often in solar eclipses. It is known as, predictably, either the diamond ring effect or the Baily’s beads effect. The beads refer to the tiny pearls and droplets of sunlight that can be seen forming around the Moon’s dark outline. When the Moon moves on enough for the beads to draw together and form a more solid and extended band of light, Baily’s beads are said to have formed the diamond ring effect – as seen here.

The CESAR team took images at every stage of the eclipse, many of which show Baily’s beads and other phenomena in more detail. These can be seen here.



Noticias relacionadas
Lunar eclipse from ESAC, 21 Jan 2019 (en)
Total lunar eclipse from ESAC Leer más
Blood Moon: longest eclipse in a century (en)
CESAR team witnessed and recorded on 27th July 2018 the longer lunar eclipse in a century, from ESAC (European Space Astronomy Center). Leer más
Eratosthenes Experiment 2018 (en)
The CESAR team organized a special experimental activity about the classical Earth’s diameter calculation, with the Caude School of Majadahonda, Madrid and IES Manuel de Falla, Maracena, Granada. The 1-2 ESO students (12-14 years old) learnt how in 200 BC, the Greek mathematician Eratosthenes calculated the circumference of the Earth using simple geometry and a few measurements. Leer más
The Sun in 2017 (en)
The Sun in 2017 as seen by the CESAR Helios Observatory located at ESAC, Madrid. The posters compile in a calendar form a sample of the images acquired during each day in 2017. Other highlights of 2017 are also shown. Leer más
CESAR at the European Planetary Science Conference EPSC: transits in our Solar System (en)
The CESAR team presented at the European Space Science Conference a paper related to their educational activities Transits in our Solar System for educational activities: Venus Transit 2012, Mercury Transit 2016 and Total Solar Eclipse 2017 Leer más
Eclipse total 2017
El 21 de agosto de 2017, miembros del equipo ESA CESAR hicieron una emocionante expedición para observar el eclipse solar total, visible desde Estados Unidos. Leer más
Global Robot Expo 2017 en Madrid
El equipo CESAR visita la feria internacional de robótica para ver las últimas tecnologías aplicadas a educación Leer más
CESAR en el taller internacional de educación espacial
La iniciativa CESAR fue invitada a participar en el taller internacional de educación espacial en Leiden, Países Bajos, dando una charla para profesores de diferentes países de la Unión Europea. Leer más
CESAR in First Space Summer School on ESAC (en)
CESAR team promoted the First Space Summer School in the European Space Astronomy Center. Leer más
Detailed image of the Sun´s surface (en)
On the image, some main features of the Sun's chromosphere such as sunspots or filaments are visible. Leer más
'First Light' for HELIOS ESAC's Solar Observatory (en)
The Sun images and videos will be posted and archived in dedicated webpages for the Solar Observatory Leer más