Celestia Forums

Hello, I have heard that Gliese 710 is on way to our solar system. About 1.4 million years it will only be 1 LY or less than 1 LY. It will be right in the oort cloud to send maybe millions of comets to the inner solar system, Earth will probably be impacted.
In 2010 Gliese 710 have a 86% chance to pass trough the oort cloud.

news from Wikipedia:
http://en.wikipedia.org/wiki/Gliese_710

news from Discovery Channel:
http://news.discovery.com/space/star-pr ... ystem.html

news from NASA:

http://apod.nasa.gov/apod/ap010707.html

I would be more worried about the Andromeda–Milky Way collision http://en.wikipedia.org/wiki/Andromeda% ... _collision

The closest galaxy collision ahead of us is

Sagittarius dSph dwarf galaxy hitting our MilkyWay

Sag dSph is heading towards the galactic plane and is only very little above it right now.


What excites us scientists about Sag dSph is that it probably is largely composed of Dark Matter

Fridger

I'm a bit frightened!

bh wrote:I'm a bit frightened!

Fortunately, the projected SGR dSph "impact" is diametrically opposite to the solar system.

Here is the impact scenario in sideways view:


Fridger

PS: "impact" is to mean the point where SGR dSph will cross the galactic plane.

That will be a bit of a bother, wouldn't it? My insurance doesn't cover galactic impact! I thought a collision between galaxies was more of a merger than anything else, with the exception of large galaxies that devour the smaller ones.

And to return to the original thread, I remember reading a little blurb about Gliese 710 a few years ago in Astronomy magazine. It's predicted to shine at magnitude 0.6, brighter than quite a few stars. Should be pretty.

Even though it would be passing at quite a distance, it reminded me of the scenario in the book What If the Moon Didn't Exist? The scenario was a star of half the sun's mass passing through the solar system. What happened in this fictitious system was:
Earth's orbit was made more eccentric
Jupiter was destroyed (it collided with a gas giant orbiting the other star)
Uranus was ejected from the solar system
Neptune was captured by the other star, and was somewhere in the star's CHZ. It began to melt and become more amenable to life (or was on it's way to becoming such.)

I can't remember if the other planets were affected or not. I would think the above would be enough.

-M-

why haven't the creators of Celestia put in Gliese 710?

It's in Celestia, but not under that name. Look for HIP 89825 or HD 168442. Apparently no one linked it to the name "Gl 710" or "Gliese 710"...