Astronomers have pondered for years why our galaxy, the Milky Way, is warped. Data from ESA's star-mapping satellite Gaia suggest the distortion might be caused by an ongoing collision with another, smaller, galaxy, which sends ripples through the galactic disc like a rock thrown into water. The warped disc of our galaxy, the Milky Way. The James Webb Space Telescope captured the Cartwheel galaxy, which is around 500 million light-years away, in a photo released by NASA on August 2. NASA/ESA/CSA/STScI. Webb's landscape-like view - "A timelapse of the Milky Way that was recorded using an equatorial tracking mount over a period of around 3 hours to show Earth's rotation relative to the Milky Way. I used a Sony a7SII with the Canon 24-70mm f2.8 lens and recorded 1100 10" exposures at a 12-second interval. The New Tourist's Guide to the Milky Way Voyager 2 Detects Odd Shape of Solar System's Edge Join our Space Forums to keep talking space on the latest missions, night sky and more! Astronomy is a natural science that studies celestial objects and phenomena. It uses mathematics, physics, and chemistry in order to explain their origin and evolution. Objects of interest include planets, moons, stars, nebulae, galaxies, meteoroids, asteroids, and comets. Astronomy Test #1. Get a hint. Doppler shifted hydrogen absorption lines are seen in the spectrum of a star. The hydrogen line at 656.28 nm is seen to be shifted to 656.08 nm. How fast is the star moving (Note: The speed of light is approximately 300,000 km/s, or 3 × 10^5 km/s.)? A) about 1,000 km/s. B) about 10,000 km/s. Assuming that the Sun’s orbit about the center of the galaxy is circular, we know that the circumference of that circular orbit is 2*pi*r, where r is the distance from our Sun to the galactic center. Since distance = rate * time, we know that time = (2*pi*r)/rate = (2*pi*2.5×10^(17) km)/220 km/sec =~ 225 million years. Jeff Mangum The Sun rotates around the center of the Milky Way Galaxy (Fig. $5-46 )$ at a distance of about $30,000$ light-years from the center $\left(1 | y=9.5 \times 10^{15} \mathrm{m}\right) .$ If it takes about 200 million years to make one rotation, estimate the mass of our Galaxy. 2vSb.