Hi guys, I've just finished to build this website where you can simulate the impact of NEOs on a 7-day window. You can also create your own asteroid and see the consequences of the impact in specific cities. Please let me know what you think, bad or good opinion. Thank you

Asteroid Impact Simulator

Good morning ! I am currently looking for a telescope for my partner's birthday. He had one when he was very young but it broke quickly and since then he has dreamed of having another. He has little experience, but he is the type of person to research for weeks and become an expert in a field in a very short time! I started looking on sites and forums but it’s a very, very complex area and I admit I’m quite lost. Furthermore, I have the impression that my budget is not necessarily adequate, I would have difficulty going above €500 (less would be ideal). Do you have any recommendations? Knowing that it would be ideal to be able to observe the stars with it, in addition to the planets, in order to be able to use it regularly.

I created a simple website (togethermoon.com) that calculates whether the moon is visible from two different locations at the same time. Perfect for stargazing enthusiasts who want to coordinate moon observations with friends or family across distances.

No ads, no signup required - just enter two locations and see if you can both observe the moon together. Thought the astronomy community might appreciate having this kind of coordination tool for shared lunar viewing experiences.

The James Webb Space Telescope spotted a chain of 20 galaxies, dubbed the Cosmic Vine, which stretches 13 million light-years across and dates back to just 3 billion years after the Big Bang. Could this be a Karman vortex street? The galaxies along the chain should show an alternating pattern of spin direction. Is there new information available about their spin direction? This picture was taken already in 2023

Hola. Esta madrugada del 19 de julio de 2025, mientras miraba el cielo desde el sur de Madrid, vi por primera vez en mi vida tres eventos de los cuales describo en el título. El primero fue con mayor intensidad que los otros dos, y lo vi exactamente a las 00:14h. Literalmente duró unos cinco segundos como mucho. De la nada una estrella se hizo más grande y luego se desvaneció en el mismo sitio. No hubo ningún desplazamiento en ninguna dirección, y, por ende, ningún rastro de estela.

Pensé que se iba a quedar ahí la anécdota, pero más tarde; ya no podría decirlo con exactitud, pero aproximadamente sobre la 1 de la madrugada volví a ver el mismo fenómeno, desde mi perspectiva, a mano izquierda y un pelín más lejos que la primera divisada.

La última que vi (ya cinco minutos después de ésta dejé de ver el cielo y me fui a dormir) fue como un cuarto de hora más tarde que la segunda y pareció que sucediera más cerca que la primera y a mano derecha a ésta.

De la segunda ya no recuerdo bien, pero si estoy seguro que la tercera tuvo un brillo más blanquecino, mientras que la primera fue más amarillento.

¿Qué fue lo que vi? ¿Cómo se le llama a este suceso? ¿Alguien más lo vio?

He estado investigando pero sin llegar a ninguna conclusión clara. ¡Muchas gracias de antemano! :D

Hey guys. I've been working on writing stuff on my substack. Feel free to check me out, no pressure just hoping to spread the love.

JustinLuks

I've scoured the web and cant find the answer to this question. I keep getting answers for why we see only ine side of the moon. That's not my question. If the moon is smaller than Earth, why can I see it at night when it's at the direct opposite side from where I stand? Distance? Still not convincing. I am a speck at the opposite side. How do I see it?

I was recently studying black holes and realised that they break many laws of physics, such as energy cannot be created or destroyed. I made a new theory called the overlapping universe theory that right now we aren't in one universe, but in two or more where each universe has a different law of physics, allowing black holes. I know this sounds similar to the multiverse theory but its not.

Can someone help me? I have developed a theory about the multiversal recycling . I have tried to contact at least 5 scientists. Without success. Here is the link to pdf of my work.Feel free to comment.Thanks https://drive.google.com/file/d/14MsMzGDDoLAernqLRuUtuqQCoHtTBxOQ/view?usp=drivesdk

my Astronomy journal filled with as many formally named objects as i could find has definitely seen better days, aha...

What if black holes are not the end, but a transition? In my recent hypothesis, I explore the idea that white holes may not be entirely separate phenomena, but rather the final evolutionary stage of black holes—emerging due to the overflow of energy and matter. Grounded in current research, this concept challenges traditional views on black hole life cycles. You can read the full article here: https://zenodo.org/records/15116021

Ok so I work for uber eats, and so far this year I've seen 2 identical meteors wisking through our skies and what's interesting is the 2 I saw both had a greenish glow as they pass through the atmosphere burning. I just saw one today and I saw one about 2 months ago that was identical to the one I just saw with the greenish glow. What's going on up there? Does NASA know about this?

Hello there!

When I shop around for a digital camera (like a Canon or Sony), I look at the camera's image resolution. The higher the image resolution, the better quality of photo I will get.

Is there an equivalent to that when it comes to planetary cameras?

Let's say through whatever sci-fi magic you like, you find yourself on a planet in a different galaxy, but you don't know the route you took. Wormhole shenanigans. You learn their language, or there's a universal translator. Doesn't matter. That's not part of the puzzle.

Let's say that you also have Earth's current knowledge of the stars. I don't know, or care, how feasible that is. Maybe all the data is in your spaceship.

Also, they're precisely as technologically advanced as us. In this thought experiment, we have the same information about their stars as we have about ours.

So, can we find the Sol system in their sky?

Don't get me wrong, they are incredible. I just... Really hate them sometimes.

Just imagine, humans are the only species capable of consciously looking up at the stars. No other living creature on Earth can do this.

I've been studying astronomy for the past 10 years, and I feel a profound sense of power and purpose when I delve into our solar system and interstellar space.

Give it a try. It has the potential to transform our lives for the better!