"We found that some comets in the inner Oort cloud form a long-lasting spiral structure." Spirals are a repeating theme in ...

The expansion of the Universe is not constant ... Our Sun is on one of the spiral arms as shown in the diagram: The Sun's orbital speed is determined almost entirely by the gravitational pull ...

Figure caption, Lower diagram shows spectrum of light redshifted from a distant galaxy moving away from the Earth The upper diagram shows the absorption spectrum from a stationary galaxy with one ...

Mark Garlick / Science Photo Library via Getty Images Meet Quipu, a new contender for the largest known structure in the universe. It’s essentially a giant cluster of galaxy clusters stretching ...

The team behind new research on the topic suggests that measuring whether gravitational waves from black hole mergers are right- or left-handed can tell us if the Cosmological Principle — an ...