<div style='margin-bottom: 20px;'> <div style="margin-bottom: 10px; background-color: #f2f2f2; border-radius: 1rem; padding: 10px 20px;"> <h2 style="font-weight: bold; margin-bottom: 3px; font-size: 1.5rem;">How does the absolute magnitude scale assist astronomers in measuring the brightness of stars?</h2> <p style="font-weight: normal; font-size: 1.2rem;">The absolute magnitude scale measures how bright stars would appear if they were all the same distance from Earth, allowing for a consistent comparison of their brightness.</p> </div> <div style="margin-bottom: 10px; background-color: #f2f2f2; border-radius: 1rem; padding: 10px 20px;"> <h2 style="font-weight: bold; margin-bottom: 3px; font-size: 1.5rem;">What are the three types of galaxies found in the universe?</h2> <p style="font-weight: normal; font-size: 1.2rem;">Spiral, elliptical, and irregular.</p> </div> <div style="margin-bottom: 10px; background-color: #f2f2f2; border-radius: 1rem; padding: 10px 20px;"> <h2 style="font-weight: bold; margin-bottom: 3px; font-size: 1.5rem;">What determines the color of a star in the universe?</h2> <p style="font-weight: normal; font-size: 1.2rem;">The temperature of a star determines its color, with cooler stars appearing red and hotter stars appearing blue.</p> </div> <div style="margin-bottom: 10px; background-color: #f2f2f2; border-radius: 1rem; padding: 10px 20px;"> <h2 style="font-weight: bold; margin-bottom: 3px; font-size: 1.5rem;">What is the primary component of galaxies?</h2> <p style="font-weight: normal; font-size: 1.2rem;">Billions of stars.</p> </div> <div style="margin-bottom: 10px; background-color: #f2f2f2; border-radius: 1rem; padding: 10px 20px;"> <h2 style="font-weight: bold; margin-bottom: 3px; font-size: 1.5rem;">How are planets in our Solar System categorized based on their proximity to the Sun?</h2> <p style="font-weight: normal; font-size: 1.2rem;">The four inner planets are rocky and small, while the four outer planets are gaseous and large.</p> </div> <div style="margin-bottom: 10px; background-color: #f2f2f2; border-radius: 1rem; padding: 10px 20px;"> <h2 style="font-weight: bold; margin-bottom: 3px; font-size: 1.5rem;">What is the name of our galaxy, and what type is it?</h2> <p style="font-weight: normal; font-size: 1.2rem;">The Milky Way, a spiral galaxy.</p> </div> <div style="margin-bottom: 10px; background-color: #f2f2f2; border-radius: 1rem; padding: 10px 20px;"> <h2 style="font-weight: bold; margin-bottom: 3px; font-size: 1.5rem;">Why does Venus have a higher average surface temperature than Mercury?</h2> <p style="font-weight: normal; font-size: 1.2rem;">Venus has a thick atmosphere rich in greenhouse gases, which trap heat.</p> </div> <div style="margin-bottom: 10px; background-color: #f2f2f2; border-radius: 1rem; padding: 10px 20px;"> <h2 style="font-weight: bold; margin-bottom: 3px; font-size: 1.5rem;">What is the significance of the main sequence in the life cycle of a star?</h2> <p style="font-weight: normal; font-size: 1.2rem;">The main sequence represents a stable phase in a star's life where the forces of gravitational attraction and the outward pressure from nuclear fusion are balanced.</p> </div> <div style="margin-bottom: 10px; background-color: #f2f2f2; border-radius: 1rem; padding: 10px 20px;"> <h2 style="font-weight: bold; margin-bottom: 3px; font-size: 1.5rem;">How does the distance between two objects affect the gravitational force between them?</h2> <p style="font-weight: normal; font-size: 1.2rem;">The force is inversely proportional to the square of the distance between them.</p> </div> <div style="margin-bottom: 10px; background-color: #f2f2f2; border-radius: 1rem; padding: 10px 20px;"> <h2 style="font-weight: bold; margin-bottom: 3px; font-size: 1.5rem;">What determines the shape of a comet's orbit around the Sun?</h2> <p style="font-weight: normal; font-size: 1.2rem;">Comets have highly elliptical orbits.</p> </div> <div style="margin-bottom: 10px; background-color: #f2f2f2; border-radius: 1rem; padding: 10px 20px;"> <h2 style="font-weight: bold; margin-bottom: 3px; font-size: 1.5rem;">What law describes the gravitational attraction between two masses?</h2> <p style="font-weight: normal; font-size: 1.2rem;">Newton's law of gravitation.</p> </div> <div style="margin-bottom: 10px; background-color: #f2f2f2; border-radius: 1rem; padding: 10px 20px;"> <h2 style="font-weight: bold; margin-bottom: 3px; font-size: 1.5rem;">What does the Doppler effect reveal about the movement of galaxies relative to Earth?</h2> <p style="font-weight: normal; font-size: 1.2rem;">The Doppler effect, through redshift, indicates that galaxies moving away from Earth have their light stretched towards the red end of the spectrum, suggesting the universe is expanding.</p> </div> <div style="margin-bottom: 10px; background-color: #f2f2f2; border-radius: 1rem; padding: 10px 20px;"> <h2 style="font-weight: bold; margin-bottom: 3px; font-size: 1.5rem;">How is the color of a star related to its temperature?</h2> <p style="font-weight: normal; font-size: 1.2rem;">The color indicates the star's surface temperature, with red stars being the coolest.</p> </div> <div style="margin-bottom: 10px; background-color: #f2f2f2; border-radius: 1rem; padding: 10px 20px;"> <h2 style="font-weight: bold; margin-bottom: 3px; font-size: 1.5rem;">How does nuclear fusion within a star generate energy?</h2> <p style="font-weight: normal; font-size: 1.2rem;">Nuclear fusion generates energy by fusing hydrogen nuclei into helium, releasing a significant amount of energy in the process.</p> </div> <div style="margin-bottom: 10px; background-color: #f2f2f2; border-radius: 1rem; padding: 10px 20px;"> <h2 style="font-weight: bold; margin-bottom: 3px; font-size: 1.5rem;">What evidence supports the Big Bang Theory as the origin of the universe?</h2> <p style="font-weight: normal; font-size: 1.2rem;">Evidence includes the observation of redshift in distant galaxies, indicating expansion, and the cosmic microwave background radiation, remnants of the early universe.</p> </div> <div style="margin-bottom: 10px; background-color: #f2f2f2; border-radius: 1rem; padding: 10px 20px;"> <h2 style="font-weight: bold; margin-bottom: 3px; font-size: 1.5rem;">What unit is used to measure astronomical distances within our Solar System?</h2> <p style="font-weight: normal; font-size: 1.2rem;">The astronomical unit (AU).</p> </div> </div>