Astro Wonders

2021-05-04 20:30:00 ​​Clouds of the Carina Nebula
Image Credit & Copyright: John Ebersole

Explanation: What forms lurk in the mists of the Carina Nebula? The dark ominous figures are actually molecular clouds, knots of molecular gas and dust so thick they have become opaque. In comparison, however, these clouds are typically much less dense than Earth's atmosphere. Featured here is a detailed image of the core of the Carina Nebula, a part where both dark and colorful clouds of gas and dust are particularly prominent. The image was captured in mid-2016 from Siding Spring Observatory in Australia. Although the nebula is predominantly composed of hydrogen gas -- here colored green, the image was assigned colors so that light emitted by trace amounts of sulfur and oxygen appear red and blue, respectively. The entire Carina Nebula, cataloged as NGC 3372, spans over 300 light years and lies about 7,500 light-years away in the constellation of Carina. Eta Carinae, the most energetic star in the nebula, was one of the brightest stars in the sky in the 1830s, but then faded dramatically. Open / Comment

2021-05-04 16:30:09 If Gravity Disappeared For Just 5 Seconds!

1. Anything that was not attached to earth would drift into space.

2. Depending on the trajectory, most asteroids would fall on earth .

3. The moon would either fly off into space or fall directly on earth .

4. All other planets would eventually fly off into deep space .

5. Lack of gravity would cause earth to expand and would explode, If gravity didn't return within few minutes .

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2021-05-04 10:31:16 Now that SpaceX's Crew-2 has launched, here is the crew for Crew-3!
Three NASA astronauts, and one ESA German astronaut.
• Commander - Raja Chari (NASA)
• Pilot - Thomas Marshburn (NASA)
• Mission Specialist 1 - Matthias Maurer (ESA)
• Mission Specialist 2 - Kayla Barron (NASA)
This mission will be the third crewed operational flight of a Crew Dragon spacecraft, and the fourth overall crewed orbital flight. This mission is currently planned for launch on 23 October 2021.
Crew-3 will use a new Crew Dragon that is currently being built.

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2021-05-04 05:30:05 Perfect Definition of Inertia

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2021-05-03 20:34:02 Apollo 11: Earth, Moon, Spaceship
Image Credit: NASA, Apollo 11; Restoration - Toby Ord
Explanation: After the most famous voyage of modern times, it was time to go home. After proving that humanity has the ability to go beyond the confines of planet Earth, the first humans to walk on another world -- Neil Armstrong and Buzz Aldrin -- flew the ascent stage of their Lunar Module back to meet Michael Collins in the moon-orbiting Command and Service Module. Pictured here on 1969 July 21 and recently digitally restored, the ascending spaceship was captured by Collins making its approach, with the Moon below, and Earth far in the distance. The smooth, dark area on the lunar surface is Mare Smythii located just below the equator on the extreme eastern edge of the Moon's near side. It is said of this iconic image that every person but one was in front of the camera. Open / Comment

2021-05-03 15:30:11 ~Wormholes were first theorized in 1916, though that wasn't what they were called at the time. While reviewing another physicist's solution to the equations in Albert Einstein's theory of general relativity, Austrian physicist Ludwig Flamm realized another solution was possible. He described a "white hole," a theoretical time reversal of a black hole. Entrances to both black and white holes could be connected by a space-time conduit.

In 1935, Einstein and physicist Nathan Rosen used the theory of general relativity to elaborate on the idea, proposing the existence of "bridges" through space-time. These bridges connect two different points in space-time, theoretically creating a shortcut that could reduce travel time and distance. The shortcuts came to be called Einstein-Rosen bridges, or wormholes. ~

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