Universe
The observable universe
The observable universe is vast and mind-bogglingly large. The most distant galaxies we can observe are so far away t…
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April 17, 2025
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Universe
Universe
How Big is the Sun Compared to Earth?
Have you ever looked up at the Sun and wondered just how big it really is compared to our planet? We know it’s massiv…
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April 08, 2025
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Universe
How big can a star form?
The stars at the bottom are the biggest currently known stars. 1 AU is the distance between the Sun and the Earth. Th…
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April 08, 2025
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Universe
What are the images that make you rethink your existence?
1. This is Earth. You and I live here. 2. And here is where we are exactly in our neighborhood, the Solar System 3. T…
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April 08, 2025
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Velocity
What is a hypervelocity star?
The mysterious hypervelocity stars jet through space at mind-bogging speeds. The fastest known one is S5-HVS1, and it…
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April 05, 2025
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Universe
How is our Galaxy coincidentally exactly 100,000 light years across?
It’s not exactly that distance across. Wikipedia says that it’s size is 87,400 ± 3,590 light years. That’s an accurac…
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April 05, 2025
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Universe
Why is Pluto no longer considered a planet?
The reason that Pluto is no longer a planet is not because of its size. In fact, it passes the test for "size&qu…
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March 24, 2025
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Universe
What is the shape of our "spacetime" if we are in a curved universe?
Space has no shape, it's just a thin soup of neutral hydrogen elements and gasses with passing alpa and beta part…
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March 20, 2025
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