Zhihu Daily
Latest recorded position: #30 on Jul 23, 2026, 8:21 AM CST.
There are not enough retained observations to calculate a rank change.
Could Earth remain habitable when the Sun becomes a red giant?
太阳在变成红巨星的时候，会不会引力变弱到吞噬不到地球，导致地球仍然处在适宜带？
ThreadEast first recorded "Could Earth remain habitable when the Sun becomes a red giant?" on Jul 17, 2026, 9:30 PM CST. It has been observed on Zhihu Daily, with 5 days between the first and latest recorded appearances.
What the trend data tells us
The English title describes the topic of the source listing. Its appearance in a ranking measures attention within that platform; the ranking alone does not explain the cause of a spike or verify the underlying claim.
This stable URL remains available after a topic leaves a live ranking. Observation span is elapsed time between sightings, not continuous time on a chart. Platforms use different ranking and heat systems; their metrics are not added together.
Original evidence
Source listings
#30Last observed rank
Original source