Starship Asterisk*

Hahaha! My 9 years old daughter looked at this picture and said "look! there's water in there!"
I don't know how long did it take for NASA to know it has water in it?
She can't read English by the way.
And this is a true story. Children are amazing.

Have you ever watered your garden while it's raining? I have. What I saw was this: The rainbow formed by the water coming out of the hose completely overlaps the rainbow on the sky. This was very interesting. Because, you perceive the hose-induced-rainbow as being 'small' while you perceive the sky-...

This movie made me think a lot. I wondered actually how much of a planetary nebulae is the material expelled from the explosion of its star and how much of it is just the interstellar dust already was there? It's likely that all the material we see in this nebula was ejected from the progenitor sta...

This movie made me think a lot. I wondered actually how much of a planetary nebula is the material expelled from the explosion of its star and how much of it is just the interstellar dust already was there?

Maybe, we should reconsider those well-known nebulae images. What do you think?

Does anybody believe NASA's project about sending people to Mars to settle there and never return where there is no oxygene and water... just a very very cold desert and no one but a few people?

I think you should have two Hubble telescopes instead of eye balls in order to see it like in this movie! With your humlble, god's gift eyes, you see only black space and stars!

What is the aproximate exposition time for an image like this? For Hubble? For Subaru? And for both of them combined?

Why in this photo does the moon soil seem greenish (or brownish) while in Apollo photos it is mostly gray? I wouldn't describe the color as greenish, but it's always dangerous to look too closely at the color in images- and not just astronomical images. Just pick any well photographed object on Ear...

Why in this photo does the moon soil seem greenish (or brownish) while in Apollo photos it is mostly gray?

Why didn't NASA design it dust-proof?

APOD Robot wrote:The crystals deflect the rays of moonlight more strongly through a minimum angle of 22 degrees.

Any explanation for this?

With its elongated beak, this galaxy looks rather like a river dolphin to me.

Could they be some molten craters?

I've always wondered why is the Martian sky not blue? I thought the color came from the scattering of shortwave light, cause it scatters far more than longer wave light. Why doesn't the same conclusion apply to Mars? Is the atmospheric composition defines the color? Or is it for the dust? I think Ma...

Is there any connection between this asteroid and the meteorid that fall in Russia the same day?

I saw something like this in 2001. It was nighttime around 11pm. Suddeny, it was like a day, there was a soundless flash! We looked at the sky and saw that some big bright spot was moving. It had a long trace which was brightly colored, red, green and blue. 7 or 8 seconds after, the bright spot fruc...

And here is a guy who moonwalks at moonrise!
https://vimeo.com/56298775

A stabilized version of the same video:
http://www.youtube.com/watch?v=5cKpzp358F4

Why are there streaks all pointing at the Sun in the comet's tail.

My hypothesis: While the comet is orbiting around the sun, the sun's wind varies in its intensity, hence the comet's tail gets brighter and dimmer according to it. Is that true?

Further sensitivity is only possible by increasing exposure time... essentially, eliminating a real-time view. I thought the objective diameter matters. The bigger the objective diameter, the more photons it captures. We could get a brighter image either by doubling the objective diameter or by dou...

The sky is too dim Beauty and wonder hidden Grow some bigger eyes -s I imagine a special kind of glasses which are opposite of sunglasses. I call them "astronomy glasses". It brightens the night sky without distorting or magnifying it. By the way, is there a binocular which has a large ob...

We and our progenitors have been in different galactic orbits for 5 billion years. Thanks! This has perplexed my mind for so many years. To summarize, our progenitor star(s) have been all dead for at least 5 billion years. They might have been hundreds of light years away when they exploded. They a...

They would all be black holes or neutron stars, which are difficult to detect in any case. 1. Are 5 billion years so many for us to backtrack our neighboring stars? 2. Isn't there any chance we hava a blackhole or a neutron star in our neighborhood? Perhaps, they would have been the remnants of our...

BMAONE23 wrote:I would imagine that the first/second generation star(s) would have met their demise over 5 billion yrars ago.

So you think we cannot distinguish Sol's grandpa star(s) from the Milkyway's commonwealth stars?

We know that Sol is either a second or a third generation star, because it has some elements other than hydrogen and helium in it. But where is the first generation star out of whose remnants Sol came into being? It should have become either an blackhole or a neutron star. Doesn't that mean there sh...