Every Saturday, TecMundo and #AstroMiniBR brings together five relevant and entertaining astronomical curiosities produced by the world’s collaborators. profile on twitter to spread the knowledge of this science, which is the oldest!
#1: The sky is black, it’s going to rain!
nebulosas escuras são nuvens de poeira tão espessas que não deixam a maior parte da radiação vinda das estrelas atrás delas chegar até os observadores!
um exemplo é a Nebulosa do Saco de Carvão na constelação do Cruzeiro do Sul que pode ser vista a olho nu#AstroMiniBR
(c) ESO pic.twitter.com/tAle1ylY7c— Giovanna Liberato (@liberato_gio) April 6, 2022
Of the many curious and intriguing things Cosmos hosts, nebula The dark ones are definitely among them. For a few moments, do the following exercise: You are an astronomer from the early 20th century, sitting at the end of an observatory telescope cataloging objects in the sky, and suddenly you see a region that is seemingly empty, starless, and black as the darkest night. What would that be? It took some time to discover that these objects were dark nebulae, interstellar clouds with a very high concentration of dust. This is because these objects scatter and absorb all incoming optical light, making them completely opaque at visible light wavelengths. Dark nebulae are easier to detect when placed in front of a bright emission nebula.
One of the most famous examples in the southern hemisphere is the nebula pictured above, the Coal Bag Nebula in Cruzeiro do Sul. The average temperature inside this nebula is very low, ranging from -260 to -170 degrees Celsius. Because of these low temperatures and high densities, a dark nebula often forms hydrogen molecules that allow for the formation of new stars!
#2: Lunar and solar eclipses are common, but not so
Por que não há um eclipse solar e lunar todos os meses?
O movimento orbital da Lua ao redor da Terra é inclinado em aproximadamente 5º, portanto a maior parte do tempo não alinhada com a Terra e Sol.
O eclipse ocorre quando o alinhamento acontece.#AstroMiniBR
(c) NASA pic.twitter.com/S3Zq5NSdl7— Ana Carolina Posses (@astroposses) April 2, 2022
celestial events such as lunar and solar eclipses It’s amazing, no one can deny it. If they were on a monthly basis, would they lose that appeal by becoming a regular thing? By the way, I thought again, if the Moon goes around the Earth about once every 28 days, why not this is the period when an eclipse occurs?
The fact is that these phenomena are not as simple and linear as they seem. A lunar eclipse occurs when the Moon is in the Earth’s shadow, and a solar eclipse occurs when the Moon’s shadow falls on the Earth. The reason they don’t happen every month is due to the fact that the Earth’s orbit around the Sun is not in the same plane as the Moon’s orbit around the Earth.
The Sun, Earth, and Moon aren’t really perfectly aligned. If the Solar System were a flat disk like the old CD and DVD discs, this would be the plane of the ecliptic and all the planets are arranged on this disk. However, the Moon would be located in another disk that was inclined at an angle of 5.14 degrees to the first. Therefore, it is sometimes located above the plane of the ecliptic, and sometimes below it, following the Moon’s orbit as it revolves around the Earth. Therefore, this play of shadow and light does not always make an eclipse possible!
#3: Moon smile
Quatro visões da Lua no colorido anoitecer do domingo! Com 6.5% de sua face visível iluminada diretamente pelo Sol, a porção que se esperaria que estivesse totalmente escura aparece iluminada pela Terra (um observador na Lua, veria agora a Terra em "fase cheia").#AstroMiniBR pic.twitter.com/C6daTgJfMi
— Projeto Céu Profundo (@CeuProfundo) April 4, 2022
In the first few days of this week, the Moon made its show in the sky. And we’re not even talking about the full moon day! Those with clear skies at night could watch a smile light up among the stars formed by the Moon’s crescent phase.
As we remember from our basic science lessons, the only object in our entire Solar System that has its own luminosity is the Sun. The perception of different moon phases is due to the fact that sunlight illuminates the Moon’s surface in different ways (as Earth does) as it orbits our planet. This light is then reflected back at us and we see it in different brightnesses throughout the month!
#4: Birth of a distant Jupiter!
O telescópio espacial Hubble flagrou um exoplaneta tipo Júpiter em formação de maneira inesperada. Ele está a uma distância da jovem estrela de cerca de duas vezes a distância de Plutão ao Sol. O brasileiro @DrRRLyrae participou da descoberta. #astrominibr pic.twitter.com/Cg72O9t59R
— Ricardo Ogando (@rilogando) April 4, 2022
Last Monday (4), NASA reported that the Hubble telescope had observed evidence of a Jupiter-like planet forming in a process described as “intense and violent.” This Jupiter-like planet is forming in a protoplanetary disk of dust and gas orbiting a young star about 2 million years old.
It may seem like a lot, but on an astronomical scale, it’s a very short time and actually this moment represents the birth of the star system. For example, our Sun is 4.6 billion years old and the planets around it formed in its first million years!
#5: Star of the Beginning of the Universe!
hoje foi publicada a detecção mais distante de uma ?? que já fizemos. ela irradiou sua luz no primeiro bilhão de anos do universo!
seu nome? Earendel. tolkienmaníacos vibram ????
Eärendil, pai de Elrond, foi o elfo responsável por transportar uma das Silmarils ??#AstroMiniBR pic.twitter.com/xR2kP5D6hk— yanna martins franco (@martins_yanna) March 31, 2022
On March 30, NASA announced the discovery of the most distant and oldest star in the Cosmos. The star, affectionately known as Earendel (“morning star” in Old English), was celebrated by Middle-earth fans for being the namesake of a character in JRR Tolkien’s mythology, a great half-elven sailor responsible for carrying a star. across the sky.
Source: Tec Mundo
I am Bret Jackson, a professional journalist and author for Gadget Onus, where I specialize in writing about the gaming industry. With over 6 years of experience in my field, I have built up an extensive portfolio that ranges from reviews to interviews with top figures within the industry. My work has been featured on various news sites, providing readers with insightful analysis regarding the current state of gaming culture.
