NASA 斥资 20 亿美元开发核动力飞船用于火星任务

本文如何被排名

Signal score

0 / 100

Composite score across the factors below. Higher = stronger signal that this story matters right now.

Newsworthiness bucket

Research

主要政府机构宣布对一项可能具有变革性的太空探索新技术进行重大投资和开发。[lever_c_demoted from significant: ic=1 ai=0.0]

Source corroboration

Single-source cluster

Only one publisher covered this so far. Single-source stories can still rank when the publisher is high-authority, but they lack cross-source corroboration.

Topics

product, infra

Editorial topic classification. Feeds into how the story surfaces on /topic/<slug> hub pages and into the per-entity coverage mix.

AI-industry relevance

Low

Off-topic or adjacent — cluster remains reachable but doesn't surface in AI-industry rankings.

Story freshness

2 days old

Coverage has settled into its steady-state source set.

完整方法见我们的编辑标准。