NGC 3370: Unlocking the Universe's Secrets | Hubble's Captivating Galaxy

Embark on a cosmic journey to NGC 3370, a spiral galaxy located in the Leo constellation, nearly 90 million light-years away. This captivating galaxy has been a frequent subject of the Hubble Space Telescope's observations for over two decades. Why? NGC 3370 holds the key to understanding the vast distances in our universe.
Within this galaxy lie two invaluable tools for astronomers: Cepheid variable stars and Type Ia supernovae. These celestial objects are the universe's very own measuring tapes, allowing scientists to determine the distance to faraway galaxies with remarkable precision.
Cepheid variables pulsate, changing in size and temperature, causing their luminosity to vary over days or months. The slower the pulsation, the more luminous the star. By measuring these pulsations, astronomers can calculate the star's actual brightness and, consequently, its distance from Earth.
Type Ia supernovae, on the other hand, offer a single explosive moment of measurement. These supernovae occur when the dead core of a star ignites in a nuclear fusion flare, peaking at similar luminosities. By knowing their intrinsic brightness, astronomers can measure the distance to these cosmic explosions.
Hubble's latest image of NGC 3370 provides a detailed view, capturing wavelengths of light not seen in previous observations. This galaxy is part of the NGC 3370 group, along with other Hubble targets like NGC 3447 and NGC 3455.
Join us as we explore the captivating NGC 3370 and discover how it helps us measure the universe's expansion.

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