This Week in Astronomy: Tianwen-3, UV Astronomy and Universe's Expansion Rate

<v Speaker 1>Welcome to Bedtime Astronomy. Explore the wonders of the cosmos
<v Speaker 1>with our soothing Bedtime Astronomy podcast. Each episode offers a
<v Speaker 1>gentle journey through the stars, planets, and beyond, perfect for
<v Speaker 1>unwinding after a long day. Let's travel through the mysteries
<v Speaker 1>of the universe as you drift off into a peaceful
<v Speaker 1>slumber under the night sky. This week in Astronomy, Tion
<v Speaker 1>one three Mission, u V Astronomy and Universe's expansion rate,
<v Speaker 1>China's Tian one three pioneering Mars sample return and redefining
<v Speaker 1>space exploration. China's ambitious space program is making significant strides,
<v Speaker 1>with its sites firmly set on Mars. The ti On
<v Speaker 1>one three mission, scheduled for launch in twenty twenty eight,
<v Speaker 1>aimed to retrieve Martian samples and return them to Earth
<v Speaker 1>by twenty thirty one. This endeavor is a testament to
<v Speaker 1>China's growing prowess in space exploration and its commitment to
<v Speaker 1>scientific discovery. The Tian three mission is a complex undertaking
<v Speaker 1>involving multiple spacecraft. It will comprise an orbiter, a lander,
<v Speaker 1>and an ascent vehicle. The orbiter will meticulously study Mars
<v Speaker 1>from its orbit while the lander will descend to the
<v Speaker 1>Martian surface to collect precious rock and soil samples. B
<v Speaker 1>samples will then be transferred to the ascent vehicle, which
<v Speaker 1>will launch them into Mars orbit. Once in orbit, the
<v Speaker 1>samples will be captured by the orbiter and transported back
<v Speaker 1>to Earth. The primary scientific objective of the Tianan three
<v Speaker 1>mission is to unravel the mystery of Mars past and
<v Speaker 1>search for potential signs of ancient life. By analyzing the
<v Speaker 1>collected samples and Earth based laboratories, scientists hope to gain
<v Speaker 1>invaluable insights into the planet's geological history, climate evolution, and
<v Speaker 1>its potential to harbor life. The successful execution of this
<v Speaker 1>mission could revolutionize our understanding of Mars in its place
<v Speaker 1>in the Solar System. It's important to note that this
<v Speaker 1>ambitious mission is part of China's broader space exploration program,
<v Speaker 1>which encompasses lunar missions, space station development, and future crude
<v Speaker 1>missions to the Moon and Mars. China's rapid advancements in
<v Speaker 1>space technology have solidified its position as a major player
<v Speaker 1>in the global space race. The tia on Iree mission
<v Speaker 1>exemplifies China's unwaihas commitment to pushing the boundaries of space
<v Speaker 1>exploration and scientific discovery. MOUVE a new vision and ultraviolet astronomy.
<v Speaker 1>The James Webb Space Telescope JWST has revolutionized our understanding
<v Speaker 1>of the cosmos, but NASA is already looking to the future.
<v Speaker 1>One ambitious proposal is the Mission to Analyze the Ultraviolet
<v Speaker 1>Universe MAUVE, a space telescope designed to explore the universe
<v Speaker 1>an ultraviolet light. Ultraviolet light offers a unique perspective on
<v Speaker 1>the cosmos, revealing high energy phenomena and visible to other wavelengths.
<v Speaker 1>By studying UV light, astronomers can gain insights into the
<v Speaker 1>formation of stars and galaxies, the evolution of exoplanet atmospheres,
<v Speaker 1>in the nature of violent cosmic events like supernovae and
<v Speaker 1>black holes. Move would build upon the legacy of previous
<v Speaker 1>UV missions such as the Hubble Space Telescope and GALAX,
<v Speaker 1>offering significant advancements like a wider wavelength range and a
<v Speaker 1>larger collecting area. This would enable MAUVE to observe fainter
<v Speaker 1>and more distant objects and study a broader range of
<v Speaker 1>astronomical phenomena. Key scientific goals of MAUVE include understanding the
<v Speaker 1>formation and evolution of galaxies, characterizing the atmospheres of exoplanets,
<v Speaker 1>and investigating high energy astrophysical phenomena. By studying the ultraviolet
<v Speaker 1>light emitted by distant galaxies, Mauve could provide insights into
<v Speaker 1>the early universe and the processes that led to the
<v Speaker 1>formation of galaxies like our milk. Analyzing the ultraviolet light
<v Speaker 1>absorbed and emitted by exoplanet atmospheres, MOVE could help determine
<v Speaker 1>the composition, temperature, and potential habitability of these distant worlds. Additionally,
<v Speaker 1>MOVE could study the extreme environments around black holes, neutron stars,
<v Speaker 1>and other high energy objects, providing clues about the fundamental
<v Speaker 1>forces of nature. If selected for development, MOVE could significantly
<v Speaker 1>expand our understanding of the universe and inspire future generations
<v Speaker 1>of scientists and explorers. Resolving the mystery of the universe's expansion,
<v Speaker 1>new findings from the James Webb Space Telescope suggest that
<v Speaker 1>an unknown aspect of the universe, rather than measurement errors,
<v Speaker 1>could explain why the universe's current expansion rate is faster
<v Speaker 1>than predictions based on its early stages billions of years ago.
<v Speaker 1>This observation supports the accuracy of Hubble space Telescope measurements,
<v Speaker 1>providing a critical cross verification of the phenomenon known as
<v Speaker 1>the Hubble tension. This long standing discrepancy challenges the standard
<v Speaker 1>model of cosmology, as it shows the universe is expanding
<v Speaker 1>at a rate inconsistent with theoretical predictions. The Hubble tension
<v Speaker 1>refers to the difference between the observed expansion rate of
<v Speaker 1>the universe, known as the Hubble constant, and the rate
<v Speaker 1>predicted by the standard cosmological model. Hubble's observations suggest a
<v Speaker 1>rate between seventy and seventy six kilometers per second permegaparsec,
<v Speaker 1>while the standard model predicts a lower value of sixty
<v Speaker 1>seven sixty eight kilometers per second per megaparsec. A difference
<v Speaker 1>of five six kilometers per second permegaparsec is too significant
<v Speaker 1>to dismiss as a measurement error, and web's hyprecision data
<v Speaker 1>confirms that Hubble's findings are accurate. The research, led by
<v Speaker 1>Nobel laureate Adam Reese, use data from WEB to validate
<v Speaker 1>Hubble's measurements. The team employed three methods to measure distances
<v Speaker 1>to galaxies hosting Supernova, aligning their results closely with Hubbles
<v Speaker 1>and ruling out substantial errors in earlier data. This consistency
<v Speaker 1>strengthens the idea that the Hubble tension arises from unknown
<v Speaker 1>factors or gaps in current physics. By observing pulsating stars
<v Speaker 1>known as sea feed variables, carbon rich stars in the
<v Speaker 1>brightest red giants, Web and Hubble's combined efforts delivered a
<v Speaker 1>nearly identical Hubble constant of approximately seventy two point six
<v Speaker 1>to seventy two point eight kilometers per second per megaparsec.
<v Speaker 1>This precision is a significant advancement, narrowing measurement differences to
<v Speaker 1>under two per cent compared to the larger discrepancy of
<v Speaker 1>the Hubble tension itself. Resolving the Hubble tension could transform cosmology,
<v Speaker 1>potentially revealing new aspects of the universe. Some theories suggest
<v Speaker 1>the tension may be linked to unknown phenomena in the
<v Speaker 1>early universe, such as an unexplored form of matter, early
<v Speaker 1>dark energy, or other exotic physics like variable electron mass,
<v Speaker 1>strange dark matter properties, or primordial magnetic fields. The Hubble constant,
<v Speaker 1>while abstract, is fundamental for understanding the large scale structure
<v Speaker 1>and evolution of the universe. It provides insights into the
<v Speaker 1>expansion dynamics of space over the last thirteen fourteen billion
<v Speaker 1>years and serves as a key metric for mapping the cosmos.
<v Speaker 1>The resolution of the Hubble tension promises to enhance our
<v Speaker 1>grasp of the universe's most enigmatic elements, such as dark
<v Speaker 1>energy and dark matter, which collectively account for ninety six
<v Speaker 1>per cent of its composition but remain poorly understood. This
<v Speaker 1>groundbreaking research, which utilized Web's unparalleled clarity and hubbles extensive
<v Speaker 1>data set, offers new opportunities to refine cosmological models. It
<v Speaker 1>marks a crucial step toward uncovering the full complexity of
<v Speaker 1>the universe and understanding its hidden mechanisms, further illustrating the
<v Speaker 1>potential of these flags ship telescopes and advancing humanity's knowledge
<v Speaker 1>of the cosmos. M d A