Starship Asterisk*

So if this is called an active galaxy because "entire galaxies fall into it", I wonder what would happen if a second nearby active galaxy would fall into the first? Would it be like two neutron stars colliding? Which one eats the other?

Something puzzles me. If the Earth-like planet LHS 475 b is orbiting its red star at a distance of 40 light years from the red star, than why does its sun look bigger in the sky than our Sun does to us which I believe is much closer to the Earth than even 1 light year away??

A question. In the close-up of JD 3 there is a small totally green galaxy that's even smaller than JD 3 at the bottom right corner. Could this be an even younger galaxy and why is it green? Was it really green, or that it was red shifted to green because of its distance and it was really some other ...

If I may conjecture about why the blue iron rich areas are not spread out evenly but mostly found gathered where the maria and oceans are. The theory goes that the Moon was formed early on when a Mars sized object crashed into the young Earth. Most of the Earth's light outer layers were blasted into...

Question: this explosion happened about 1,000 human-years ago. And now it's 10 LY-wide. Is that speed of light possible? My brain can't figure it out... First thing to note is that a light year is not a measure of time, but a measure of distance. Now if the Crab Nebula spans 10 ly, then it's radius...

Out of curiosity just how fast is this comet speeding? According to Ann's C/2022 E3 (ZTF) link showing the comet's path it states that the comet will make its closest approach to Earth on February 1st, and then according to the diagram the comet will just whiz past Mars between February 11 and 12. T...

Chinese_Tiangong_Space_Station.jpg The Chinese Space Station; Is it treat to national security? :roll: Is it a treat? Sure is. I presume though you meant a threat. Not likely. China is one of 100 countries or so that have signed the 1967 Outer Space Treaty. It states that all space exploration shou...

I can understand the frustration with the relevancy of the traditional full moon names for people that live in the Southern Hemisphere. For example what do Australians make of the Harvest Moon falling at the beginning of springtime when farmers are more likely planting seeds instead of harvesting? A...

jagganath69 wrote: ↑Wed Jan 04, 2023 7:34 am I'm curious: what's the galaxy's designation ?

According to the Wikipedia page for CG 4, the spiral galaxy to be 'devoured' is designated, ESO 257-19.

Happy New Year. The headline is true as far as we know currently. But there seems to be some speculation that Jupiter may have a rocky or metallic hydrogen core that is larger than the Earth. Wiki says that Jupiter's core might have a mass 4 to 25 times Earth's mass. That means there is a larger roc...

Something doesn't add up. If the Hubble Space Telescope "Spacecraft" took this picture, and as far as I know the Hubble is still in orbit around the Earth, then how can it take a picture of the night side of the mini planet when it is even farther away than Pluto?

Where else can you see that? Well I think I seen very similar pictures like that (minus the rainbow) in Patagonia. Near the Straits of Magellan. Sort of like at the opposite end of the Earth from Norway.

The Merrick and the Mitten Buttes are sure the most beautiful buttes I ever did see. They sure are beautes! Also the 'Jim'inids are sure Jim-dandy looking meteor showers themselves. Merry Christmas.

Re the title, Cassini Looks Out From Saturn on 2022 DEC 23. I could have sworn that when Cassini plunged into Saturn's atmosphere in September 2017 that talk was that it couldn't survive and that it would burn up and be destroyed! Do you mean that Cassini actually survived and that it is functioning...

Just for the trivial record, according to Wiki's List of brightest apparent stars, number 26 brightest is Bellatrix in Orion. While Polaris the North Star is 48th brightest.

Speaking of incredible coincidences of returning from the Moon, Apollo 17, nearly 50 years earlier, at precisely 6:35 PM EST time today December16th, blasted off from the Moon for the previously last time.

What does this statement really mean? "It took about an hour for the Red Planet to disappear behind the lunar disk and then reappear as a warm-hued full Moon," Does this mean the the red planet we call Mars, actually turned into a warm-hued Moon as it reappeared? Or does it mean somebody p...

Re why can't you see the tyre track. First the Moon's gravity is only 1\6th the Earth. The tyres are mesh balloon tires designed to spread weight over a large area compared to the astronauts boots. The lunar buggy was designed to be light and not sink deep into the soft ground. Now there was a lot o...

I question whether the image A317-147-22465 was used to make this 3D image. If you go to the link you can see the command module in 22465 is just to the left of the mountain side still over the valley. Even in 22466 the command module has just 'climbed' half way up the mountain. BUT in 22467 the CM ...

I like it where it says "We are much nearer to the front edge than the back edge." So this means in other words that something 450 light years away is closer to us than something 1,500 light years away. (It makes me feel good that the money I spent on a college tuition was well spent.)

Impressive. But why don't I have any luck when I go to view a meteor show. For years now when I go out during the peaks, I'll be lucky if I spot one in 10 minutes of watching! And I live out on a farm in the country so the skies are relatively dark. The last time I seen 3 flash at the same time was ...

This reminds me of the Apollo 8 photograph of the Earth where somebody said (I believe it was Carl Sagan) Everybody who was ever born and died or is alive today .. is in this photograph.. except for 3 men .. who are behind the camera! Well in this case since the spaceship is unmanned .. everybody wh...

Why does the moon look so featureless and kind of dark? Since we see the planet Earth way behind the Moon and since the Moon always presents the same face to the Earth because of tidal locking, what you are seeing is the "dark side of the Moon". It is actually more featureless because the...

Sometimes the APOD information isn't 100% accurate. Here they say the giant thunderstorm over Bangladesh we assume happened in late April, 2022. However the Flickr link says that the photo was taken on April 27, 2014. So most likely the Bangladesh storm also took place in 2014 rather than in April t...

I am just curious about the speed of this spacecraft. If it was launched at 1:47am then it was launched on the darkside of the Earth although not exactly at the middle of midnight. Now if this picture was taken over an hour later, (And I don't think that when people say that they don't mean 10 hours...