Notice: file_put_contents(): Write of 8435 bytes failed with errno=28 No space left on device in /var/www/tg-me/post.php on line 50
Solidot | Telegram Webview: solidot/25127 -
Telegram Group & Telegram Channel
数十亿年前掠过太阳系的恒星改变了太阳系生态

2024-09-09 23:23 by 艾米七号

新证据显示,数十亿年前可能有一颗恒星非常接近太阳系,这次飞掠导致了数千个位于海王星外的小天体被偏转,进入高倾角的椭圆轨道环绕太阳运行,有些天体甚至可能被木星或土星捕获,成为其卫星,研究结果发表于《自然天文学》和《天文物理学快报》。有些人认为太阳系的边界就是海王星的轨道。实际上还有已知的数千个天体在海王星轨道外移动,这些被称为海王星外天体(Trans-Neptunian Object 或 TNO)。在这些 TNO 中,有许多的直径超过 100 公里,它们的轨道相当怪异,不仅轨道偏心,还与太阳系行星的共平面轨道呈倾斜状态。研究团队进行了超过 3,000 次的模拟来研究这些异常轨道的可能成因,其结果显示,一颗接近的恒星可能导致这些奇特的轨道特征。根据模拟,最符合当前太阳系外部状况的是一颗质量略轻于太阳的恒星,约为 0.8 倍太阳质量,这颗恒星以约 165 亿公里的距离飞掠过太阳系附近,比现在航海家一号的距离还近。

https://www.nature.com/articles/s41550-024-02349-x
https://iopscience.iop.org/article/10.3847/2041-8213/ad63a6
https://tam.gov.taipei/News_Content.aspx?n=EF86D8AF23B9A85B&sms=F32C4FF0AC5C2801&s=9A710C235DA206FD

#太空



tg-me.com/solidot/25127
Create:
Last Update:

数十亿年前掠过太阳系的恒星改变了太阳系生态

2024-09-09 23:23 by 艾米七号

新证据显示,数十亿年前可能有一颗恒星非常接近太阳系,这次飞掠导致了数千个位于海王星外的小天体被偏转,进入高倾角的椭圆轨道环绕太阳运行,有些天体甚至可能被木星或土星捕获,成为其卫星,研究结果发表于《自然天文学》和《天文物理学快报》。有些人认为太阳系的边界就是海王星的轨道。实际上还有已知的数千个天体在海王星轨道外移动,这些被称为海王星外天体(Trans-Neptunian Object 或 TNO)。在这些 TNO 中,有许多的直径超过 100 公里,它们的轨道相当怪异,不仅轨道偏心,还与太阳系行星的共平面轨道呈倾斜状态。研究团队进行了超过 3,000 次的模拟来研究这些异常轨道的可能成因,其结果显示,一颗接近的恒星可能导致这些奇特的轨道特征。根据模拟,最符合当前太阳系外部状况的是一颗质量略轻于太阳的恒星,约为 0.8 倍太阳质量,这颗恒星以约 165 亿公里的距离飞掠过太阳系附近,比现在航海家一号的距离还近。

https://www.nature.com/articles/s41550-024-02349-x
https://iopscience.iop.org/article/10.3847/2041-8213/ad63a6
https://tam.gov.taipei/News_Content.aspx?n=EF86D8AF23B9A85B&sms=F32C4FF0AC5C2801&s=9A710C235DA206FD

#太空

BY Solidot


Warning: Undefined variable $i in /var/www/tg-me/post.php on line 283

Share with your friend now:
tg-me.com/solidot/25127

View MORE
Open in Telegram


Solidot Telegram | DID YOU KNOW?

Date: |

Tata Power whose core business is to generate, transmit and distribute electricity has made no money to investors in the last one decade. That is a big blunder considering it is one of the largest power generation companies in the country. One of the reasons is the company's huge debt levels which stood at ₹43,559 crore at the end of March 2021 compared to the company’s market capitalisation of ₹44,447 crore.

Unlimited members in Telegram group now

Telegram has made it easier for its users to communicate, as it has introduced a feature that allows more than 200,000 users in a group chat. However, if the users in a group chat move past 200,000, it changes into "Broadcast Group", but the feature comes with a restriction. Groups with close to 200k members can be converted to a Broadcast Group that allows unlimited members. Only admins can post in Broadcast Groups, but everyone can read along and participate in group Voice Chats," Telegram added.

Solidot from us


Telegram Solidot
FROM USA