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cover of episode Cosmic Queries – Negative Gravity

Cosmic Queries – Negative Gravity

2025/5/13
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StarTalk Radio

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People
C
Captain Carl
C
Cesar Fredik
D
Dennis Alberti
E
Eric Krasjadoti
F
Frank Oz
J
Joe Lipparella
J
John Mayhoy
J
Julian Ray
M
Margot Lane
M
Mark Lord
N
Neil deGrasse Tyson
以主持《宇宙:时空之旅》和《星谈》等科学节目而闻名的美国天体物理学家和科学传播者。
P
Paul Mercurio
S
Stephan Summers
T
Terry Burke
Topics
Eric Krasjadoti: 如果我创造一台时间机器回到过去,我会不会到达空旷的太空?因为太阳系已经不在我出发时的位置了。 Neil deGrasse Tyson: 时间机器不仅仅是时间上的移动,也必须包含空间上的移动。在《回到未来》中,他们巧妙地通过选择相同的日期来避免了这个问题,确保地球在轨道上的位置不变。如果你只是在时间上移动,你会发现自己身处空旷的宇宙中。因此,任何时间旅行都必须考虑到太阳系在空间中的运动,确保你到达正确的时空坐标。否则,你可能会发现自己迷失在宇宙的虚空中。我们访问火星也是同样的道理,要计算好提前量。 Paul Mercurio: 所以,除非你也回到空间中,否则你会被丢在太空中,因为一切都在移动。

Deep Dive

Shownotes Transcript

What happens to gravity when matter converts to energy? Neil deGrasse Tyson and co-host Paul Mecurio dive into fan questions about the speed of light, time machine mistakes, and what Neil would do if he were an alien.

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