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#Space

257 posts161 participants22 posts today
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KB Sez

It's Official: #NASA Confirms New Interstellar Object Is Zooming Through Solar System

Astronomers on Wednesday confirmed the discovery of an interstellar object racing through our #SolarSystem – only the third ever spotted, though scientists suspect many more may slip past unnoticed.

The visitor from the stars, designated 3I/Atlas is likely the largest yet detected. It has been classified as a comet

#Space #Science

sciencealert.com/its-official-

ScienceAlert · It's Official: NASA Confirms New Interstellar Object Is Zooming Through Solar SystemUpdate: NASA has confirmed the object is an interstellar comet and says it has been officially named 3I/ATLAS.
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Fitheach

I've noticed that many former astronauts are exceedingly long-lived. John Glenn was 95yo when he died. Michael Collins was 90yo when he died. Buzz Aldrin is very much still with us at 95yo, as is Jim Lovell (pictured) at 97yo.

I wonder if anyone has researched the reasons for their longevity.

#space#health
Continued thread
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grobi

What’s a Nova? Inside the Chaos of Erupting and Exploding Stars
Chelsea Gohd, NASA Universe Web Team

In short, a nova is an outburst in a binary system, or system with two stars that closely orbit one another.

In all known novae, one of the stars in the system is a white dwarf, which is the leftover core of a star like our Sun after it runs out of fuel. Its companion will typically be either a main sequence star, a classification that includes 90% of known stars, or a large star like a red giant approaching the end of its life.

In most systems that create novae, the white dwarf and its companion star orbit so closely that the white dwarf’s gravity pulls material from the companion. This material swirls around the white dwarf and forms an accretion disk. Throughout this process, the white dwarf's gravity will pull the material toward itself, depositing it onto its own surface, which while fluid in consistency is extremely hot and dense.
The material pulled from the atmosphere of the companion star is primarily hydrogen. Over time, that material builds up on the surface of the white dwarf. As hydrogen accumulates, it is heated by the white dwarf, and that heat builds until it eventually triggers a fusion reaction. In other words, the gas is explosively ejected from the surface of the white dwarf.
Novae are, on average, around 200,000 times as bright as the Sun, while the brightest novae can be 10 times brighter than that. Novae can even be bright enough to be seen with the unaided eye from Earth, even if the star system wasn’t visible prior to the outburst. Novae can last for days, weeks, or even months.
There is variety among novae, as they can take place with different types of companion stars and can last for different amounts of time and with varying levels of brightness. However, there are two main types: classical and recurrent[...]
science.nasa.gov/universe/what

#space#nova#astrophotography
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Lazarou Monkey Terror 🚀💙🌈

I am excited by the new interstellar visitor, 3I/ATLAS because not only is it coming close enough to Mars for our satellites around it to get a good view but it also shows we get interstellar visitors quite regularly even in this relatively quiet part of the Milky Way suburbs.

Star systems exchange material like ships in the night, we are not as isolated in Space as we like to think...

#Astrodon#Space#3IATLAS
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grobi

TOPIC> Novae

2025 July 3
A starfield is shown with constellations annotated. The band of our Milky Way galaxy runs diagonally from the upper left to the lower right. Just above the image center is a faint dot that is annotated in yellow -- V462 LUPI, a nova that was visible with the unaided eye last week and is currently still visible with binoculars.

Nova V462 Lupi Now Visible
* Image Credit & Copyright: Matipon Tangmatitham (NARIT)
facebook.com/matiponphotograph
en.wikipedia.org/wiki/National

Explanation:
If you know where to look, you can see a thermonuclear explosion from a white dwarf star. Possibly two. Such explosions are known as novas and the detonations are currently faintly visible with the unaided eye in Earth's southern hemisphere -- but are more easily seen with binoculars. Pictured, Nova Lupi 2025 (V462 Lupi) was captured toward the southern constellation of the Wolf (Lupus) last week near the central plane of our Milky Way galaxy. Nova Lupi 2025 was originally discovered on June 12 and peaked in brightness about a week later. Similarly, Nova Velorum 2025, toward the southern constellation of the Ship Sails (Vela), was discovered on June 25 and peaked a few days later. A nova somewhere in our Galaxy becomes briefly visible to the unaided eye only every year or two, so it is quite unusual to have two novas visible simultaneously. Meanwhile, humanity awaits even a different nova: T Coronae Borealis, which should become visible in northern skies and is expected to become even brighter.

Lupus
en.wikipedia.org/wiki/Lupus_(c
en.wikipedia.org/wiki/V462_Lup

Vela:
en.wikipedia.org/wiki/Vela_(co
en.wikipedia.org/wiki/V572_Vel

100% Human Website 💕
spaceweather.com/archive.php?v

apod.nasa.gov/apod/ap250703.ht

#space#nova#astrophotography
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